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If you use primal surge, are those cards considered that they were cast? And if yes, wouldn't it make sense to use primeval bounty? I'm thinking running my endless ranks of the dead, 2 times parallel lives, primeval bounty, then throw down primal surge

I'm new to mtg. If I have a {endless ranks of the undead}, 2 {parallel lives}, 2 zombie creature cards, and 2 2/2 zombie tokens on battlefield. At my next upkeep, how many zombies would come on the field? I was thinking it would be 6 tokens because the 2 parallel lives would just simultaneously double the endless ranks. Am I correct?