With Swarm Shambler and Werewolf Pack Leader and an Inscription of Abundance, you can trigger Werewolf Pack Leaders Pack Tactics ability on your turn three attack
If Battle Angels of Tyr has any Auras or Equipment attached to it, those don't get copied
With a big enough army, you can push through all your opponents' defenses to poison out all your opponents in a single turn
In this format, each player builds their own deck around a legendary creatureknown as the Commanderwhich serves as the heart and soul of your strategy
And if the other copy is ever found, it could be worth even more, depending on whether its been kept in mint condition
Sacrifice after III.) I, II Prevent all damage that would be dealt to creatures you control this turn