The Rack - (Foil): Time Spiral Timeshifted Alara Reborn return it to the battlefield

return it to the battlefield under its owner's control with a -1/-1 counter on it

Remove 100 charge counters from Vexing Puzzlebox: Search your library for an artifact card

sacrifice it unless you exile another Merfolk you control

Each creature you control with defender assigns combat damage equal to its toughness rather than its power and can attack as though it didn't have defender

Activate only during your turn and only once each turn

The Rack - (Foil): Time Spiral Timeshifted Alara Reborn return it to the battlefieldAs The Rack enters the battlefield, choose an opponent. At the beginning of the chosen player's upkeep, The Rack deals X damage to that player, where X is 3 minus the number of cards in their hand.