Deathspitter Biomorph

Enchant land you control.
Enchanted land has "{t}: Add {b/r}{s}"
If a source you control would deal damage to a creature an opponent controls, put that many
-1/-1 counters on that creature instead.
A Deathspitter is a Tyranid Bio-weapon, which
launches corrosive maggot creatures. Wherever those
maggots strike, volatile fluids splatter across and sear
any flesh and melt any armour.