Mothdust Changeling

Oracle Text

Changeling (This card is every creature type.)

Tap an untapped creature you control: Mothdust Changeling gains flying until end of turn.

Card Rulings

4/1/2008 Since the activated ability doesn’t have a tap symbol in its cost, you can tap a creature (including Mothdust Changeling itself) that hasn’t been under your control since your most recent turn began to pay the cost.