Although Marvel doesn't inherently do anything when it enters play without some setup, at four mana, players could take their time over the first few turns accumulating Energy counters with Attune with Aether, Woodweaver's Puzzleknot, and Aether Hub, so Marvel could eventually be activated on the same turn it's played for a potential combo win
Open a Star Portal to gather power and unleash a Subspace Swell with Origin Forme Palkia VSTAR
If you do, return this card and 1 face-up monster your opponent controls to the hand during the End Phase of your opponent's next turn
Edited by bobandbill and Z25.
Of course, you ideally wont give it back, but its nice that you get a little bonus
Played Played karta vypad tak patn, jak jen me bnm pouvnm bez obal