Duskwatcher Trials

Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell
pays for {1} or one mana of that creature's color.)
Return X permanents from your graveyard to
your hand, where X is the number of tapped
creatures you control. As long as this spell is in
your graveyard, you have no maximum hand size.
Participants are encouraged to devote themselves to the
Duskwatchers and forsake love and fear and emotion.