A Monstrous Rage used on Slickshot Show-Off is one of the scariest things you can see if you don't have removal, and often leads to a game win
That means tokens from Sigil of the Empty Throne and enchantments coming back from the graveyard still draw you cards
This is especially true in Commander, where you only have a one-in-a-hundred chance of drawing the specific card you need each turn
Besides having Flash (which means it can be played whenever you use an Instant), you get to choose one of three effects when the snake enters
It reads: "[Winter Stockpile] Whenever one of your characters is banished, you may put that card from your discard into your inkwell facedown and exerted." Sitting at around $145.48 on TCGplayer right now, I can only seeing it going up in value over the next few months
They all have effects that you can use once you're at max speed, making them great later in the game as well (especially Muraganda Raceway which turns into a land that taps for two mana)