Mongolian Death Wurm

This Spell Can't Be Countered.

Cascade, Cascade.

Trample, Vigilance, Haste, First-Strike, Menace,
Double-Strike, Toxic 1.

When This Creature Enters the Battlefield, Each Opponent Sacrifices 3 Non-Token Permanents
those who can't gain 3 poison counters.

Other Wurms you control have Cascade.