Abathur, Evolution Master

You may choose not to untap Abathur during
your untap step.
3 XP: {t}: Target creature you control gets
+2/+2 as long as Abathur remains tapped.
7 XP: {t}: As long as Abathur remains tapped, at
the beginning of your upkeep, create a 2/2 Black Locust creature token.
10 XP: {t}: Create a token that's a copy of a
creature you control, except the token is not legendary if the targeted creature is legendary.
Destroy the token when Abathur untaps.