The -Koro strategies are a series of six themes centered around the Field Spells belonging to the archetype of the same name. Each of them combines an Attribute with a specific playstyle and encourages the use of the matching Turaga, as well as Matoran and other Warriors of the correct Attribute. To learn more about the individual strategies, refer to the dedicated Theme Guides linked below.
Ta-Koro, Village of FireField Spell
While all face-up monsters you control are FIRE (min. 2), face-up monsters you control cannot be destroyed by your opponent’s card effects. If your FIRE monster battles an opponent’s monster with higher original ATK, before damage calculation: You can discard 1 card; your monster gains ATK equal to the highest original ATK on the field, until the end of this turn. You can only use this effect of “Ta-Koro, Village of Fire” once per turn.
Ga-Koro, Village of WaterField Spell
During your opponent’s turn, if all monsters in your GY are WATER (min. 1), your opponent cannot activate cards or effects in response to the activation of your WATER monster effects as Chain Link 2 or higher. You can banish 1 monster from your GY; Special Summon 1 WATER monster from your hand in Defense Position, but its effects are negated and it becomes the same Type as the banished monster’s, also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except WATER monsters. You can only use this effect of “Ga-Koro, Village of Water” once per turn.
Onu-Koro, Village of EarthField Spell
You can target up to 5 EARTH monsters in your GY; shuffle them into the Deck, then gain 600 LP for each card shuffled into the Main Deck this way. If your LP are higher than your opponent’s: You can send 1 EARTH monster from your hand or field to the GY, then pay LP in multiples of 1000 (max. 3000); draw 1 card for every 1000 LP paid, then, if your LP are lower than your opponent’s, send that many cards from your hand to the GY. You cannot Normal or Special Summon monsters the turn you activate this effect, except EARTH monsters. You can only use each effect of “Onu-Koro, Village of Earth” once per turn.
Po-Koro, Village of StoneField Spell
If a monster(s) you control would be destroyed by battle or card effect, you can banish 1 Rock monster you control instead of destroying 1 of those monsters. If you Fusion, Synchro, Xyz, or Link Summon using an EARTH monster as material: You can banish 1 EARTH Warrior monster from your GY; you cannot conduct the same type of Summon for the rest of this turn, also Special Summon “Sculpture Tokens” (Rock/EARTH/Level 1/ATK 0/DEF 0) equal to the number of EARTH monsters used as material. You can only use this effect of “Po-Koro, Village of Stone” once per turn.
Ko-Koro, Village of IceField Spell
While all face-up monsters you control are WATER (min. 1), apply these effects.
●If you did not declare an attack during your last turn, monsters your opponent controls cannot attack the turn they are Summoned.
●If none of your opponent’s cards were destroyed or banished by your card effects since your last Standby Phase, monsters you control cannot be destroyed by your opponent’s card effects, also your opponent cannot target them with card effects.
●If you did not activate any monster effects this turn, negate the effects of face-up Special Summoned monsters while your opponent controls them.
Le-Koro, Village of AirField Spell
Your opponent’s monsters cannot target WIND monsters you control for attacks, except the WIND monster you control with the highest ATK (either, if tied). When you Normal or Special Summon a monster(s) that has a Level: You can target 1 of those monsters; negate its effects (if any) and make its ATK 0, and if you do, add 1 WIND Warrior monster with a different name and an equal or lower Level from your Deck to your hand, also you cannot Special Summon for the rest of this turn, except WIND monsters. You can only use this effect of “Le-Koro, Village of Air” once per turn.
Meanwhile, this page right here will go over some cards contained in the expansion that can be inserted into any of these six strategies to supplement its respective Turaga, assortment of Matoran, and possibly even Toa.
First of all, we have the one of the few support cards that qualify the -Koro Field Spells for the rank of an archetype rather than a simple series or theme.
The Island of Mata NuiField Spell
All Normal Summoned “Toa Mata” monsters gain 600 ATK/DEF. During your Main Phase: You can reveal 1 monster in your hand and add 1 “-Koro” Field Spell that mentions that monster’s Attribute from your Deck to your hand. If you revealed a “Toa Mata” monster, you can add 1 “The Great Temple, Kini-Nui” instead. If a card in your Field Zone, except “The Island of Mata Nui”, is destroyed while this card is in your GY: You can activate this card, but banish it when it leaves the field. You can only use each effect of “The Island of Mata Nui” once per turn.
The Island of Mata Nui acts as an additional searcher for your Field Spell(s) and returns from the GY to the field should one get destroyed, allowing you to simply add another copy. The condition is having a monster of the matching Attribute in your hand to act as a “guide” to the village, but that should usually be the case in a properly built -Koro deck. The effects that support the Toa Mata with a stat boost and a search for a different card are actually relevant in these strategies too, as we will see with the following cards.
The Great Temple, Kini-NuiField Spell
During your Main Phase, you can Normal Summon 1 “Toa Mata” monster in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) If a “Toa” monster(s) is Tributed for the Tribute Summon of a “Toa Mata” monster and sent to your GY: You can target 1 of those monsters; Special Summon it in Defense Position, but banish it when it leaves the field. During the End Phase: You can destroy this card, and if you do, Special Summon 1 Level 1 Rock monster with 0 ATK/DEF from your Deck. You can only use each effect of “The Great Temple, Kini-Nui” once per turn.
SuvaEffect MonsterLevel 1 | LIGHT Rock | ATK 0 / DEF 0
While in your hand, and while face-up on the field if you control a “-Koro” Field Spell, this card is also EARTH, WATER, FIRE, and WIND-Attribute. Once per Chain (Quick Effect): You can pay 600 LP, then target 1 “Toa” monster you control; equip 1 “Kanohi” Equip Spell from your hand or GY to that target, except a card that is in the GY because it was destroyed while face-up on the field and sent there this turn. If you control a “Toa” monster: You can Special Summon this card from your GY. You can only use this effect of “Suva” once per turn.
Kini-Nui and Suva, together with the Toa Mata of the respective Attribute and their matching Kanohi, form a little package that can be inserted into any -Koro deck to get an additional main deck boss with relatively low investment. The extra Normal Summon from Kini-Nui means a Toa in your hand can be brought out without hindering your regular plays, while the Suva’s effects to count as almost all Attributes in the hand and revive itself as long as you control a Toa Mata makes it free Tribute fodder. Kini-Nui can also blow itself up in the End Phase to get a Suva from the Deck to the field, which will conveniently trigger Mata Nui in the GY and provide you with a 600 ATK/DEF boost to your Toa. And of course, the Suva gives you access to any Kanohi in the GY while it is on the field, equipping the Toa of your choice with additional useful abilities.
So there is some clear payoff to running these, but you should also keep in mind that these cards do essentially nothing if they happen to be in your hand without a Toa in sight. The Suva gains its multi-attribute effect on the field as well if you control a Koro, which makes it potentially usable as a combo piece, but that’s about it. It may be a good idea to base the degree to which you commit to this Toa Mata package on the ease with which your Deck can make Isolde, as that is the easiest way to ensure you have the Toa in hand and thus everything else live.
Also check the individual theme guides linked above for more in-depth testing videos.