When this creature enters, create four 1/1 colorless Myr artifact creature tokens. Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.
![Egg Hammer - Myr Battlesphere (Rainbow Foil) [Secret Lair Drop Series]](http://paradoxtcg.com/cdn/shop/files/643606_289f1297-ea76-49e4-a347-19eebdce9b51.jpg?v=1776205622&width=1445)
