mtg cards that give flash MTGNexus (You may cast this card from your graveyard for its flashback cost Instants or Sorceries with Flash.

In addition, each card type has its own set of subtypes that can only correlate to that type

Slinza, the Spiked Stampede offers an Urzas Incubator for Beasts, coupled with additional +1/+1 counters, and even a fight trigger that lets you add red to your pile

Since the deck is a Voltron one, the creature count is low, and the amount of Equipment and Auras is high

I also feel that you've got several different options to go with this deck

Even sacrificing a token to pay the emerge cost is cheaper than hard-casting this Eldrazi octopus

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