Thelsea, The Alluring

This spell can't be countered.
During each of your turns, put an entice counter
on Thelsea, The Alluring. When Thelsea, The
Alluring has 5 entice counters, gain control of
any number of creatures with converted mana
cost X, where X is the number of creatures on the
battlefield with a CMC of 5 or less that isn't legendary. As long as you have control 5 or more enticed creatures, you gain Hexproof, Lifelink,
and Scry 1.