what are proxy mtg cards - High Quality MtG Proxy Creating MTG Proxy Cards: A

You can either use it to counter a non-creature spell, or kill the creature you couldn't counter

it theoretically handles fewer creatures, but not many players have more than 13 creatures by the time a board wipe is necessary, and sacrificing permanents gets around indestructible

The flashback on Memory Deluge isnt just free flashback value instead of looking at four cards, you get to look at seven

Worldpurge Worldpurge was a fixed Upheaval, though the resulting card may still be broken

The front faces of transforming double-faced cards are marked with a triangle facing up on the top left

I think its got a lot of potential in the 99 of various lifegain decks (both Trelasarra, Moon Dancer and Elas il-Kor, Sadistic Pilgrim spring to mind), but I could also see this as the commander of a creature-centric mono-white lifegain deck too