I think I have a better idea for Kai'Sa
Voidborne Kai'Sa
Level 6
DARK, Warrior/Effect
2100 ATK
1000 DEF
If this card destroys a monster as a result of battle or if a monster is destroyed by the effect of a plasma counter; increase this card's original attack by 300. Once per turn, when this card battles (quick effect); you can place 6 Plasma counters spread evenly across all monsters your opponent controls (remainder tokens are placed on the monsters of your choice). If Kai'Sa has an ATK of at least 3000, then place 12 plasma counters instead.
(Each Plasma counter reduces the ATK of a monster by 100. If a monster with Plasma counters on it has 0 ATK, it is destroyed.)
Rulings:
- The placement of Plasma counters does not target.
- Destruction by plasma counters is not treated as a spell, trap or monster effect.
- The effect to place plasma counters starts a chain.
- The effect to increase Kai'Sa's attack is a continuous effect.
Also, a few notes for a more professional appearance:
- When placing tokens, you must declare the attribute, type, level, attack and defense. Some effects of tokens can remain on the card but must be stated (example, cannot be tributed except for a card effect). Otherwise, they must also be labeled as effect monsters (such as "if destroyed, deal damage).
- Tuner types can still be normal monsters. The Voidling needs to be marked as an Effect monster as well (so Insect/Tuner/Effect).
- Void as a monster type is pretty arbitrary. You'd be better off making it a name archtype with "Voidborne" for monsters and "Void" for spell and trap cards.
- The summoning mechanic you have in place for most of your void monsters is too strong. Even with the requirement of "different names", it would be far too easy to play your entire hand.
- I think you should have done better to stick to the underlying theme of "all consuming" within your void theme, as I've illustrated with Kai'Sa effect. Each card should be rewarded better for successfully using their effects. Cho'Gath should simply gain the attack after destroying the monster, but being unable to attack normally if the effect was used. Kassadin should become immune to card effects upon successful direct attack. And so on.
All in all, not too bad. I can drum up more ideas and help you with other aspects if you want.
