Ivern

When you conquer or hold, you may exhaust me to replace that battlefield with a Brush battlefield token. (Bird, Cat, Dog, Poro, and Ivern units have +1 in Brush. It can be swapped back when scored.)

When you play me or when I hold, look at the top 3 cards of your Main Deck. You may reveal a unit from among them and draw it. Recycle the rest. Then if you revealed a Bird, Cat, Dog, or Poro, do this: [Buff] a friendly unit. (Give it a +1 buff if it doesn't have one.)

As you play me, choose Bird, Cat, Dog, or Poro. I gain that tag.
When I conquer or hold, score 1 point if your units have all of the following tags among them — Bird, Cat, Dog, and Poro.

I enter ready.
Reduce my cost by 1 for each of the following tags among your units — Bird, Cat, Dog, and Poro.
When I attack while your units have all 4 tags, [Stun] an enemy unit here. (It doesn't deal combat damage this turn.)