Addendum is an Ability Word found (mostly) on instants that have additional or alternative effects if you cast the spell during your main phase.[1]

Expansion Info

Addendum was introduced into Magic Arena with Ravnica Allegiance (open beta).

Video

Watch this explanatory video to see how Addendum works.

Azorius_Mechanic_Spotlight_Addendum

Azorius Mechanic Spotlight Addendum

Addendum Card List

9 results
Arrester's Admonition.png Arrester's Admonition C2.pngBlue (3)
Instant
Return target creature to its owner's hand.

Addendum — If you cast this spell during your main phase, draw a card.

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Arrester's Zeal.png Arrester's Zeal White (1)
Instant
Target creature gets +2/+2 until end of turn.

Addendum — If you cast this spell during your main phase, that creature gains flying until end of turn.

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Code of Constraint.png Code of Constraint C2.pngBlue (3)
Instant
Target creature gets -4/-0 until end of turn.

Draw a card.
Addendum — If you cast this spell during your main phase, tap that creature and it doesn't untap during its controller's next untap step.

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Emergency Powers.png Emergency Powers C5.pngWhiteBlue (7)
Instant
Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Emergency Powers.

Addendum — If you cast this spell during your main phase, you may put a permanent card with converted mana cost 7 or less from your hand onto the battlefield.

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Precognitive Perception.png Precognitive Perception C3.pngBlueBlue (5)
Instant
Draw three cards.

Addendum — If you cast this spell during your main phase, instead scry 3, then draw three cards.

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Sentinel's Mark.png Sentinel's Mark C1.pngWhite (2)
Enchantment — Aura
Flash

Enchant creature
Enchanted creature gets +1/+2 and has vigilance.
Addendum — When Sentinel's Mark enters the battlefield, if you cast it during your main phase, enchanted creature gains lifelink until end of turn.

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Sphinx's Insight.png Sphinx's Insight C2.pngWhiteBlue (4)
Instant
Draw two cards.

Addendum — If you cast this spell during your main phase, you gain 2 life.

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Summary Judgment.png Summary Judgment C1.pngWhite (2)
Instant
Summary Judgment deals 3 damage to target tapped creature.

Addendum — If you cast this spell during your main phase, it deals 5 damage instead.

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Unbreakable Formation.png Unbreakable Formation C2.pngWhite (3)
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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Keywords

Abilities Evergreen Abilities: DeathtouchDefenderDouble StrikeEnchantEquipFirst StrikeFlashFlyingHasteHexproofIndestructibleLifelinkMenaceProwessReachTrampleVigilance
Other Keyword Abilities: AfflictAftermathAfterlifeAscendConvokeCrewCyclingEmbalmEternalizeFabricateImproviseJump-StartKickerMentorRiotSpectacleTransform
Ability Words  AddendumEnrageRaidRevoltUndergrowth

Actions AdaptExertExploreSurveil

References

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