Ur-Sith of Elements

Whenever an opponent destroys one or more
other permanents you control, do 3 damage to
any target and gain 3 life.
Whenever an opponent casts a spell, that player
may pay {1}. If they don't, you draw a card.
Whenever a creature an opponent controls attacks
you or a planeswalker you control, that player sacrifices a creature or pays {2}. If that player
doesn't, destroy the attacking creature.