mtg return cards from exile Dread - The List Reprints (You may cast this card from your graveyard for its flashback cost Legal in Vintage, Rules Text:

Leaf-Crowned Visionary Elves have a new lord, too, and its Leaf-Crowned Visionary

The companion's other abilities apply only if the creature is on the battlefield

While Rainbow Dash is in play, each time you attack with a creature that has flying or haste, you get 20 percent cooler

Thats because the regular tokens strategy has basically been completely outclassed by Hare Apparent decks at this point, so the only reason youd care to run Slime Against Humanity for tokens is if you care about Oozes in particular.

This supply issue was partly due to existing long-term demand and partly to its somewhat limited printing in a Universes Beyond precon