
Instant
Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)

Protects your board from removal/wraths at instant speed.

Free white instant that protects your creatures from destruction.

Grants indestructible to all permanents you control.

Phases out multiple permanents to dodge wraths, often free.

No—replace

White instant that redirects mass damage back at attackers.

Mass protection from chosen colors plus indestructible-style safety.

White instant answering attacks, protecting your life total/board.
→ Infinite card draw
→ Destroy all lands, creatures, and artifacts your opponents control, Mass Land Denial
→ Permanents you control phase out during your opponents' turns, Your life total can't change during your opponents' turns, Lock
→ Each opponent's life total becomes 1, Exile all cards in hands and graveyards, Exile all permanents opponents control
→ Permanents you control phase out during your opponents' turns, You have protection from everything during your opponents' turns, Your life total can't change during your opponents' turns
→ Skip all your future turns, causing your opponents to eventually draw from an empty library and lose the game, You have protection from everything, Your life total can't change