Those cards care about the number of permanent cards put into that player's graveyard from anywhere this turn
If you choose not to cast the copy, or you can't cast it (perhaps because there are no legal targets available), the copy will cease to exist the next time state-based actions are performed
Giving our Wolves and Werewolves trample and buffs is pretty easy, but it can be more difficult for our supporting cast
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The current iterations of this deck use some generated tokens before casting this at x=2, hitting the only two creatures in the deck: Worldspine Wurm and Xenagos, God of Revels, giving them a 30/30 trample crashing in that leaves behind three 5/5 tokens if you kill it without an exile effect
Unbreakable Formation was a solid $3 card before getting reprinted to oblivion