It can't evolve on your first turn or the turn it's played which helps keep the ability balanced
From Teferis Protection to Comeuppance, white has a lot of these options

Alone these single words made little or no sense but when combined in proper numerical order with other cards in the series spell out the following secret message: "Here are some cards that didn't make it to print: Socks of Garfield, Hot Monkey Love, Colonel's Secret Recipe, Squee's Play, Banned in France, Spoon, Disrobing Scepter, Butt Wolf, Lotus Roach, Sesame Efreet, Needless Reminder Text, Chicken Choker, Clockwork Doppelganger, Henway, HELP I'M TRAPPED IN CARTA MUNDI, Mad Cow, Poke, Lord of Wombats, Gratuitous Babe Art, Brothers' War Bonds, Dwarven Kickboxer, Mickey's Drunk, Pact with the Wastes, CoP:BO, Urza's Chia Pet, Thallid Shooter, Shoelace, When Chihuahuas Attack, Wall of Cookies, Kobold Ninja, Mucusaur, Kjeldoran Outhouse, Bear in the Woods, Dental Thrull, Flavatog, Cereal Killer." The flavor texts of the cards Double Dip, Double Play, Double Deal, Double Take, and Double Cross form the following limerick: In a duel and taking a lickin'

When you want to play another one, move the current Stage card to your Trash pile
Winner: Walking BallistaWalking Ballista (Creatures: 3, Enchantments: 2, Artifacts: 1) 4
Rampant Growth, Cultivate, Grow from the Ashes, Explosive Vegetation, Growth Spiral, and Explore fix colors and accelerate early turns