If the enchanted creature gains flying, Trapped in the Tower is put into your graveyard as a state-based action. The creature won't get stuck in the tower again when it loses flying.
2019-10-04
Activated abilities contain a colon. They're generally written “[Cost]: [Effect].” Some keyword abilities are activated abilities and will have colons in their reminder text. Triggered abilities (starting with “when,” “whenever,” or “at”) are unaffected by Trapped in the Tower.
Lovlighet:
Standard: Ikke lovlig
Pioneer: Lovlig
Modern: Lovlig
Legacy: Lovlig
Vintage: Lovlig
EDH / Commander: Lovlig
Pauper: Lovlig
Explorer: Lovlig
Historic: Lovlig
Brawl: Ikke lovlig
Premodern: Ikke lovlig
93/94: Ikke lovlig
Trapped in the Tower er ikke lovlig i noen blocker.