Cotillion, the Rope

Whenever Cotillion, the Rope attacks, you may
put a stun counter on him. If you do, Cotillion,
the Rope deals 2 damage to each other creature.
(If a permanent with a stun counter would become untapped, remove one from it instead.)
Convergence —Whenever Cotillion, the Rope
attacks, if there are four or more legendary permanents on the battlefield, you may destroy
target creature.