Can I enchant tokens?
{Rancor} + {Horncaller's Chant}?
Absolutely! Tokens count as creatures while on the battlefield, and are effected by cards that interact with creatures.
And here's your ruling, from the Comprehensive Rules:
216.2. A token is subject to anything that affects permanents in general or that affects the token's card type or subtype. A token isn't a card (even if represented by a card that has a Magic back or that came from a Magic booster pack).
RESOLVED