Discover is like a cascade-meets-spin-the-wheel mechanic: exile cards from the top until you hit a nonland with mana value X or less
(It's an artifact with " , Sacrifice this token: Add one mana of any color.") Legendary Creature - Dragon Color tag templates(None) Ganax, Astral Hunter Flying Whenever Ganax or another Dragon you control enters, create a Treasure token
if its been banned or restricted in an officially sanctioned Constructed format, Spike can get it for four black mana, 8 life or something inbetween
Id avoid going with too many super-fatties, sticking with dangerous mid-cost creatures that have hexproof
This effect is Tendrils of Agony territory, so it wins the game with the kind of destructive board wipe no one plays anymore after things like Sunfall
Mechanics like this tend to be popular, and Improvise was no exception