mtg cards with cumulative upkeep What is in Magic the Gathering? Cumulative Upkeep that has "Upside"?

Reyemile: Lemme add Whip of Erebos and Sorin, Vengeful Bloodlord to the pile of life gain legends

The activation is cheap, but you'll have to re-equip whatever you unattach, so Akiri really wants to be surrounded by some cheap equipment

More recently Deed is a key part of many Landstill decks in Vintage, as they are facing down a lot of cards that cost one and two mana

Skyhunter Skirmisher

It doesn't seem great at all, but then again I get to play with Massacre Girl, Known Killer which by itself is fun anyway

Comet, Stellar Pup is a good boy (yes, he is!), and this card can generate Squirrel tokens, but its in the wrong colors to be a true payoff