Valka, Walking Menagerie

Changeling (This card is every creature type.)
Valka, Walking Menagerie's power and toughness
are each equal to the number of token creatures
you control.
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.)
Token creatures are treated as nontoken creatures
when casting spells and activating abilities.