Unbreakable Formation {2}{W}
Instant
Creatures you control gain indestructible until end of turn.
Addendum — If you cast this spell during your main phase, put a +1/+1 counter on each of those creatures and they gain vigilance until end of turn.
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Cards that do something similar expected a card that isn't here?
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Ready // Willing 86%
$0.31#15570
"Creatures you control gain indestructible until end of turn. Untap each creature you control."
Duty Beyond Death 85%
$0.27#2673
"Creatures you control gain indestructible until end of turn. Put a +1/+1 counter on each creature you control."