Talk:Day 171-180/@comment-124.83.16.225-20151118121324/@comment-4784862-20151120110134

Yeah, it's mentioned in the ability list that he can summon anything he's proven to be stronger than, or is of a equivalent or superior rank to.

That's probably largely why he's able to summon those after he ranks up again.

Eating/Defeating (not sure if defeating counts, but eating definitely does) basically flags him to summon any creature of equivalent rank to whatever he just ate.

That's likely why he's able to create Trolls and whatnot right after learning the Giant summoning...because he got it from Balor and the other Fomor, so he was able to summon anything of their strength or lower.