Phalanx Formation
Instant
Any number of target creatures each gain double strike until end of turn. (They deal both first-strike and regular combat damage.)
Legal in
Pioneer, Modern, Legacy, Vintage, Commander
Rulings (5)
You choose how many targets each spell with a strive ability has and what those targets are as you cast it. It's legal to cast such a spell with no targets, although this is rarely a good idea. You can't choose the same target more than once for a single strive spell.
2014-04-26
If such a spell is copied, and the effect that copies the spell allows a player to choose new targets for the copy, the number of targets can't be changed. The player may change any number of the targets, including all of them or none of them. If, for one of the targets, the player can't choose a new legal target, then it remains unchanged (even if the current target is illegal).
2014-04-26
If a spell or ability allows you to cast a strive spell without paying its mana cost, you must pay the additional costs for any targets beyond the first.
2014-04-26
The mana cost and mana value of strive spells don't change no matter how many targets they have. Strive abilities affect only what you pay.
2014-04-26