Angel of Salvation | Magic: The Gathering
Formats Angel of Salvation is Legal in
Official Oracle Text for Angel of Salvation
When Angel of Salvation enters the battlefield, prevent the next 5 damage that would be dealt this turn to any number of target creatures and/or players, divided as you choose.
Official Rulings for Angel of Salvation
2/1/2014 : Convoke allows you to tap creatures in lieu of paying mana as part of casting a spell. You first determine the total cost to cast the spell, including any additional or alternative costs, as normal. Then, for each colored mana in that total cost, you may tap an untapped creature of that color you control rather than pay that mana. Similarly, for each generic mana in that total cost, you may tap an untapped creature you control rather than pay that mana.