You lose out on the Treasure but you gain flashback, and with all the draw-two or draw-three card synergies laying around, this black instant from Modern Horizons 3 can do work
All you do is attack with the Jumbo Cactuar, and in response, cast Fling to sacrifice him and deal 10,000 damage to any one player
Creature - Giant Color tag templates(None) K'rrik, Son of Yawgmoth ( can be paid with either or 2 life.) Lifelink For each in a cost, you may pay 2 life rather than pay that mana
You also need to have an impactful walker to play the next turn because your opponent will likely just refill
You can't look at face-down permanents or spells you don't control unless an effect instructs or allows you to do so
Infinite Guideline Station Infinite Guideline Station is a tough one to pull off because outside of hybrid mana cards, multicolored permanents tend to be more expensive and legendary