Shimmering Efreet
{2}{U}
Creature -- Efreet
2/2
Flying
Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)
Whenever ~this~ phases in, target creature phases out. (It phases in before its controller untaps during their next untap step.)
Teferi's Imp
{2}{U}
Creature -- Imp
1/1
Flying
Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)
Whenever ~this~ phases out, discard a card.
Whenever ~this~ phases in, draw a card.
Warping Wurm
{2}{G}{U}
Creature -- Wurm
1/1
Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)
At the beginning of your upkeep, ~this~ phases out unless you pay {2}{G}{U}.
Whenever ~this~ phases in, put a +1/+1 counter on it.