Prussia's Imperial Anthem

Whenever this enchantment enters the battlefield, choose a creature and a color. That creature gets
+2/+2 and indestructible. This creature is a
Noble in addition to it's other types. If this
creatures leaves the battlefield, exile this card, and return it to the battlefield at the beginning of your next combat phase.
Creature cards in your hand with converted mana cost 1 can be cast without paying their mana cost.