any number of cards mtg Rules Text: sacrifice, any, number, 154 You Can Run Any Number

So many options

The only problem with it is that because you're capped at one damage per draw, you're quite likely to deck yourself before you kill everyone at the table (in a four player Commander game, that is.) You're not locked in however

Contagion Engine bullies one opponent on ETB then sticks around to double-proliferate on activation

You can find all sorts of fun fantasy creatures like Dragons, Vampires, Slivers, and more

Giant Fan has the name, flavor text and art

(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Plasma riflesseparating soft tissues from hard ones since 2077