Meren, Ingenious Polymorph

This spell can't be countered.
Hexproof
At the beginning of combat on your turn, you
may pay {2}{g}{u} and reveal a nonlegendary
creature card from your hand. If you do, Meren, Ingenious Polymorph becomes a copy of that
card, except its name is Meren, Ingenious
Polymorph, it`s legendary in addition to its other types, and it has hexproof and this ability.