Final Absorb

Enchant land you control.
Enchanted land has "{t}: Add {1}{s}"
{3}{b}{b}{s}{s}{s}{s}{s}: Destroy all nontyranid
nonland permanents, you gain 3 life and create
3/3 colorless Tyranid creature tokens with
trample and deathtouch, for each permanent destroyed this way.
Activate this ability only as a sorcery.