mtg armageddon card MTGNexus Destroy all lands. Magic the Gathering Portal Rare

Then exile it.) There are more wonders in this universe than you could ever have dreamt of

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How does this kind of multiplayer play out

All of these ideas come from my teeth-related nightmares, hope it all comes through

Obuun, Mul Daya Ancestor At the beginning of combat on your turn, up to one target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is Obuun's power

Vraska, Betrayal's Sting is a flexible proliferate option that also acts as removal or a finisher, but personally I feel she's a bit overcosted at 5 mana minimum