Muelsyse, Last of Her Kind

Islandwalk
Muelsyse, Last of Her Kind can't block.
When Muelsyse enters the battlefield and when it
attacks, create a 2/1 blue Elemental creature token.
{u}{u}{u}, {t}: Reveal a creature card from your hand.
Target Elemental has base power and toughness
equal to the revealed creature until your next turn.