Kappa, River Child

Whenever a Swamp enters under your control, target opponent puts a -0/-1 counter on each creature they control.

Whenever an Island enters under your control, target opponent puts a -1/-0 counter on each creature they control.

Whenever a nontoken creature an opponent controls dies, if its toughness was less than 1, that creature's controller discards a card. If its power was less than 1, you draw a card.