mtg cards like soul warden Similar to Lifeblood (VG) you gain 1 life. Soul Warden | Secret Lair

it gains you life, trades with almost any creature on the board, and leaves a literal army behind for your opponent to deal with

Grist, the Hunger Tide is technically a creature outside the battlefield but not on the card text itself, so it sits outside this ranking as an honorable mention

You want even MORE math

It single-handedly revitalized those decks into competitive lists labeled as 8-cast and has done an incredible job since being released

I just find it interesting that it more happened by inertia than careful planning

It also helps that this is an incredibly silly effect - the sort of thing we'd expect to see in an unset than on a regular Magic card - and tied to a very popular Marvel character