Dalamadur

Dalamadur costs {1} less to cast for each land card
in all graveyards.
Trample, reach, vigilance, indestructible.
Whenever Dalamadur is dealt damage, put that
many +1/+1 counters on it, then sacrifice it if it's
toughness is greater than the number of lands in
play. Whenever Dalamadur leaves the battlefield,
each player puts the top X cards of their library
into their graveyard, where X is it's power.