The Destroyer

{t}: Destroy target nonbasic land. You gain life
equal to this cards power.
Multi-Strike, Vigilance, Trample, Improvise
This creature enters the battlefield with counters
equal to X mana spent.
When this creature leaves the battlefield, create
a number of probes equal to half the counters.
When this creature deals damage to a player,
you may destroy target permanent with mana
value less than or equal to the damage they
received.