Think of it as a spell that has three possibilities for its cost and effect(s): the left side, the right side, or both sides
Simple, but definitely useful
Number 2 - Charizard GX - 350 Im sure no one is surprised to see Charizard GX Rainbow rare near the top of the list as it held the number one spot for a long time
Korvold, Fae-Cursed King One of the most busted sacrifice commanders in the game, Korvold, Fae-Cursed King tends to exploit Treasure more often than other creatures, but its still lets you sacrifice your Shambling Ghast and similar cards while rewarding you with plenty of card draw for taking the game actions your deck wanted to do anyway
These are the ones that springs to mind: Al-Abaras Carpet (A little too expensive) Ring of Immortals (Could be good but too expensive) The Hive (Same as above but a tiny bit better) Disrupting Scepter (This could work but its not an amazing card) Jayemdae Tome (We all know this is definitely going into the deck) Jalum tome (This one can also help us find the tron pieces so it may make the cut) Ok, after having looked at this Im not convinced this will work