Unnatural Growth {1}{G}{G}{G}{G}

Enchantment

At the beginning of each combat, double the power and toughness of each creature you control until end of turn.

Prints	USD	EUR	TIX
Secret Lair Drop	✶ $17.57
Magic Online Promos			0.04
Bloomburrow Commander	$2.79	€1.79	0.13
Wilds of Eldraine: Enchanting Tales	$2.40	€1.53	0.02
Innistrad: Double Feature	$3.41	€2.95	0.14
Innistrad: Midnight Hunt Promos #206p	$2.39	€0.99
Innistrad: Midnight Hunt Promos #206s	✶ $4.60
Innistrad: Midnight Hunt #206	$2.48	€1.87	0.02
Innistrad: Midnight Hunt #365	$3.18	€3.03
View all prints →

If an effect instructs you to "double" a creature's power, that creature gets +X/+0, where X is its power as that effect begins to apply. Similarly, a creature whose toughness is doubled gets +0/+X, where X is its toughness as the effect begins to apply. (2021-09-24)
If a creature's power is less than 0 when it's doubled, instead that creature gets -X/-0, where X is how much less than 0 its power is. For example, if an effect has given Bear Cub, a 2/2 creature, -4/-0 so that it's a -2/2 creature, doubling its power and toughness gives it -2/+2, and it becomes a -4/4 creature. (2021-09-24)

If you control more than one Unnatural Growth, each one applies independently. For example, if you control two copies of Unnatural Growth, a 2/2 Bear Cub becomes a 4/4 creature when the first ability resolves and then becomes an 8/8 creature when the second one resolves. (2021-09-24)