Ladybug

Level Up (You may pay {x} at any time to level up
this creature, where {x} is its level plus 1. Also it
starts on level 1.)
Level 1 - Whenever you cast a spell, Ladybug gets
+1/+1 until end of battle.
Level 2 - Whenever you cast a spell, Ladybug gets
+2/+2 until end of battle.
Level 3 - Whenever you cast a spell, Ladybug gets
+3/+3 until end of battle.