Whenever you cast an instant or sorcery spell that targets only this creature, if you control one or more other creatures that spell could target, choose one of those creatures. Copy that spell. The copy targets the chosen creature.
The copy is created on the stack, so it’s not cast. Abilities that trigger when a player casts a spell (like Beamsplitter Mage’s ability itself) won’t trigger.
2018-10-05
wotc
The controller of a copy can’t choose to pay any alternative or additional costs for the copy. However, effects based on any alternative or additional costs that were paid for the original spell are copied as though those same costs were paid for the copy.
2018-10-05
wotc
The ability triggers whenever you cast an instant or sorcery spell that targets only Beamsplitter Mage and no other object or player, and only if you control another creature that spell could target. If you cast an instant or sorcery spell that has multiple targets and Beamsplitter Mage is chosen as the target in each instance, Beamsplitter Mage’s ability will trigger.
2018-10-05
wotc
In some rare cases, the original spell can target another creature but the copy can’t (most likely because an effect modified the characteristics of the original spell on the stack and won’t modify the copy). If the copy can’t target the chosen creature, the copy isn’t created.
2018-10-05
wotc
If you don’t control another creature the spell could target as Beamsplitter Mage’s triggered ability resolves, you don’t copy that spell.
2018-10-05
wotc
If you copy a spell, you control the copy. It will resolve before the original spell does.
2018-10-05
wotc
If the spell that’s copied is modal (that is, it says “Choose one —” or the like), the copy will have the same mode. A different mode cannot be chosen.
2018-10-05
wotc
If the spell that’s copied has an X whose value was determined as it was cast (like Selective Snare does), the copy has the same value of X.
2018-10-05
wotc
If Beamsplitter Mage leaves the battlefield or becomes an illegal target for the spell that caused its ability to trigger, that spell is still copied.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Legal
Timeless
Legal
Gladiator
Legal
Pioneer
Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Not Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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