mtg 0 cost cards Tezzeret, Cruel Captain Exploring 3 Zero Mana Value

Its claim to fame was in the sideboard of Splinter Twin against Jund in Modern of years ago

Whenever one or more creatures you control each with power greater than its base power deals combat damage to a player, draw a card

Upgrading this is tricky

Aetherborn Warrior : Creature (Aetherborn Warrior), casting cost of two generic and one black mana, 3/2

One or two target creatures each get +2/+0 until end of turn

After a long game of generating value with copied spells, we can crack down in a couple of different ways, but some of the spiciest are definitely: Mnemonic Deluge will take the absolute best instant or sorcery in anyones graveyard and shoot it out three times