Rituals. ... Sucha spell can be cast following the normal rulesfor spellcasting, or the spell can be cast as a ritual. The ritual version of a spell takes 10 minutes longer to cast than normal. It also doesn't expend a spell slot, which means the ritual version of a spell can't ...
This use is confirmed by the existence of board games shaped as liver models for instructing extispicy, by a commentary to the rules of the game and by allusions in texts. For instance, in a letter of praise to king Esarhaddon, the crown prince of Assyria, Ashurbanipal wishes to be ...