Permanents phase back in during their controller's untap step, immediately before that player untaps their permanents
This iconic 8-cost Amethyst powerhouse can exert opposing characters and completely freeze them down, preventing them from readying on their next turn
The idea of pyromancy, hurling flame like you'd found the right flower in the Mushroom Kingdom, is so alluring that one of the game's first Planeswalkers (Chandra Nalaar) was designed as an embodiment of the concept
Final Fantasy V Perfect Conquest Guidebook (in Japanese)
But even more importantly, it has the unparalleled Unwind ability, granting Resist +1 to all of your characters
To perform the Song, the character is exerted, akin to tapping or turning it sideways