I actually like this card more in decks that can blink it than in pure Zombie tribal, where six-drops basically need to win the game
Vance's Blasting Cannons is perhaps the most aspirational card on this list but is almost perfectly serviceable as just a red howling mine (do we have a good name for "effect that draws you another card each turn"?) It notably doesn't let you play lands, but cards like Outpost Siege don't give you the story equity this card does
Note that it is a may clause too, which is important
Think your opponents feeling lucky
You have made exactly one promise and you have organised your entire existence around keeping it
Well add in some removal and threats that have a bit of randomness tacked on: Polymorph Reweave Proteus Staff Chaos Warp Shapeshifter's Marrow Telemin Performance Helm of Obedience Polymorph, Reweave, Proteus Staff, and Chaos Warp can exchange a dangerous threat for a small utility creature, or put something even more dangerous onto the battlefield