Trid, Kraken Caller

Whenever you cast an instant or sorcery spell,
create a 1/1 blue Tentacle creature token.
Sacrifice a Tentacle: Add {r}. Only spend this
mana on an instant or sorcery spell.
Sacrifice nine Tentacles: Create a 9/9 blue
Kraken creature token. Then it deals damage
equal to its power to target creature.