古参の戦導者

古参の戦導者のパワーとタフネスは、それぞれあなたがコントロールするクリーチャーの総数に等しい。あなたがコントロールするアンタップ状態の他の同盟者を１体タップする：ターン終了時まで、古参の戦導者は先制攻撃か警戒かトランプルのうち、あなたが選んだ１つを得る。

Veteran Warleader

Veteran Warleader's power and toughness are each equal to the number of creatures you control.
Tap another untapped Ally you control: This creature gains your choice of first strike, vigilance, or trample until end of turn.

Battle for Zendikar Promos

Battle for Zendikar

Veteran Warleader's power and toughness are each equal to the number of creatures you control.
Tap another untapped Ally you control: Veteran Warleader gains your choice of first strike, vigilance, or trample until end of turn.

Duel Decks: Zendikar vs. Eldrazi

The ability that defines Veteran Warleader's power and toughness works in all zones, not just the battlefield. If Veteran Warleader is on the battlefield, it will count itself.

To activate the last ability, you can tap any other untapped Ally you control, including one that hasn't been under your control since the beginning of your most recent turn. (Note that ability doesn't use the tap symbol.)

Vigilance matters only as attackers are declared. Giving a creature vigilance after that point won't untap it, even if it's attacking.

You choose which ability Veteran Warleader gains as the last ability resolves, not as you activate it.