can you use tap abilities as instants
Tap abilities are able to be used during anyones turn, so yes they are considered used at instant speed, however; you need to keep in mind that if you were to play the Haze Frog on your turn, for whatever reason, and you played the Splinter Twin on it the same turn, you would still have to wait a full turn to use it as the Haze Frog would still have ...