So if you have Summon: Bahamut in play with one lore counter, and you proliferate it twice to land on Chapter III (draw two cards), you'll also get to trigger Chapter II (destroy a creature)
Both sets share an almost identical card pool, and the languages look kind of similar
To provide a metagame snapshot, I limited myself to tournaments held after the August 26 bans
It gains "When this creature dies, draw a card and create a tapped 4/3 white and black Vampire Demon creature token with flying." Legendary Creature - Vampire Cleric Color tag templates(None) Commander (CTRL to add secondary) Artifact Qty: 11 Price: 10.78 Arcane Signet : Add one mana of any color in your commander's color identity
You need a specific objective or a certain board state before you even consider investing resources to crack open the battle (apart from discarding a card, paying three mana, and tapping this thing)
In other words, Achilles will come down for its reduced cost often, provide a decent threat, and buff your entire board as long as he remains on the battlefield
