Xantcha enters under the control of an opponent of your choice. Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls. {3}: Xantcha's controller loses 2 life and you draw a card. Any player may activate this ability.

Cumulative upkeep—Add {R}. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

As an additional cost to cast this spell, pay X life. All creatures get -X/-X until end of turn.