Cloudshaper Elf

Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell
pays for {1} or one mana of that creature's color.)
If no mana was spent to cast Cloudshaper
Elf, create 3 0/3 white cloud tokens with
flying
Tap X Cloud creature: Cloudshaper gains
+X/+X and flying until end of turn