Witherbloom Charm is amazing for its "draw two cards mode," perfect for sacrificing Pest tokens or creatures that are hit by an opponent's removal spell, or even to turn excess lands into more action late in the game
Theres a reason you see this cleaning up in Commander so often
Before Wizards of the Coast released the Alpha set, the game went through multiple test phases, and the Gamma Playtest cards were among the most refined
All of the powerhouse things this can enable from Aristocrats bringing back cannon sacrifice fodder to Midrange or Blink recurring ETB stuff like in color Karmic Guide or next door in the color wheel Mulldrifter and Acidic Slime
I meant any creature capable of dealing damage, from Thornwind Faeries to anything with a Hermetic Study
In terms of sacrifice outlets , youre looking at playing Golgari Guildmage, Nantuko Husk, and Vish Kal, Blood Arbiter