Oasis

Players play a Magic subgame, using their libraries as their decks. Each player who doesn't win the subgame loses half their life, rounded up.

Flying At the beginning of your upkeep, sacrifice a land. If you sacrifice an Island this way, this creature deals 3 damage to you. When you control no lands, sacrifice this creature.

This creature gets +0/+3 as long as it's untapped.

Destroy target permanent.

When this creature dies, destroy all creatures blocking or blocked by it. They can't be regenerated.

T: Target creature gets +1/+1 until end of turn.

T: Add C. T: Regenerate target Elephant.

At the beginning of each end step, put a +1/+1 counter on this creature for each creature that died this turn.