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When Elven Bow enters the battlefield, you may pay {2}. If you do, create a 1/1 green Elf Warrior creature token, then attach Elven Bow to it.
Equipped creature gets +1/+2 and has reach.
Equip {3}
The Elf Warrior creature token enters the battlefield as a 1/1 creature. Any abilities that trigger when a creature with a certain power or toughness enters the battlefield will see the token enter as a 1/1 creature.
You decide whether to pay {2} as the enters-the-battlefield ability resolves. If you do, you immediately create the Elf Warrior creature token and attach Elven Bow to it. No players may respond to your decision to pay or not, and no player may take actions during this process.
