Unbreakable Formation

Instant    (CMC:3)

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.

388 CMR • ENMatt Stewart

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Pioneer,Modern,Legacy,Vintage,Commander

Oracle Text (click to copy):

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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1/25/2019
Unbreakable Formation affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t gain indestructible or vigilance and they won’t get a +1/+1 counter.
1/25/2019
Addendum abilities of instant spells apply while the spell is resolving, not immediately after casting it. If the spell is countered, you don’t get the addendum bonus. For example, if you cast Sphinx’s Insight during your main phase, you gain 2 life during its resolution, after you draw two cards.
1/25/2019
If a spell with an addendum ability is copied, the copy won’t give you the addendum bonus. This is because the copy wasn’t cast at all.

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