Both cards were either an instant or a sorcery
That would mean breaking the laws of time
Sandwurm Convergence: A great 'go big' creature in Standard
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Illustrated by: Chris Rahn Multiverse ID: 491671 Tazri, Beacon of Unity Commander decks Tazri, Beacon of Unity Historic Brawl decks Not Legal Traditional Standard Not Legal Traditional Alchemy Rulings 2020-09-25 To determine the cost of Tazris activated ability, you choose which cost youll pay for each of the four mana symbols (either or one mana of the appropriate color), add up the total cost, apply any additional costs, then apply any cost reductions
Card not found doesnt really see play, but I bet it could be great in certain environments (like slow formats, where graveyard hate isnt played much)