Reverent MantraHow it works & interactions with other cards

Alternative Casting and Color Choice

The primary appeal of Reverent Mantra is its alternative cost: instead of paying three colorless and one white mana, you may exile a white card from your hand. This allows you to respond to threats even when you are fully tapped out. When the spell resolves, you choose a single color (White, Blue, Black, Red, or Green). It is important to note that you do not choose the color when you cast the spell, but only as it resolves.

Universal Protection

Unlike many protective spells, Reverent Mantra affects all creatures currently on the battlefield, including those controlled by your opponents. Protection prevents four specific things: damage from sources of that color, enchanting/equipping by that color, blocking by creatures of that color, and targeting by spells or abilities of that color. Because it doesn't target, it can be used to save creatures that have Shroud or Hexproof.

Strategic Timing

Common mistakes involve forgetting that this spell affects your opponent's creatures too. If you give all creatures protection from white, you cannot target your opponent's creatures with your own white removal spells for the rest of the turn. Additionally, protection only functions while a permanent is on the battlefield; it does not prevent a creature spell on the stack from being countered by a spell of the chosen color.

Interaction examples

Dodging Targeted Removal

Generous Gift

Suppose your opponent casts Generous Gift to destroy your favorite creature. In response, you cast Reverent Mantra and choose white. As Reverent Mantra resolves, your creature gains protection from white. When Generous Gift tries to resolve, it checks its target and sees it now has protection from white; the spell is then countered by the rules because its target is illegal.

The Global Shield Comparison

Teferi's Protection

While Teferi's Protection gives you protection from everything and phases your permanents out to keep them safe from board wipes, Reverent Mantra is specifically for creatures and works on a shared scale. If an opponent casts a red damage-based board wipe, you can cast Reverent Mantra for free by exiling another white card, choosing red to ensure all creatures (including yours) take no damage, whereas Teferi's Protection would only save your own assets.