Dragonskull Key enters the battlefield tapped.
: Add or to your mana pool.
Put Dragonskull Key on top of your library: Add to your mana pool.
, : Exile target Wizard Rogue, then return it to the battlefield under its owner's control.
: Add 
or 
to your mana pool.
to your mana pool. , : Exile target Wizard Rogue, then return it to the battlefield under its owner's control.
