Rise of the Hobgoblins
Enchantment
When this enchantment enters, you may pay 
. If you do, create X 1/1 red and white Goblin Soldier creature tokens.
: Red creatures and white creatures you control gain first strike until end of turn.
A river even the merrow dare not cross.
Jeff Miracola
Eventide (EVE)
• #145Rulings
When the "enters" ability resolves, you choose the value of X, pay for it, and put the tokens onto the battlefield. You can activate mana abilities to pay for {X}, but no one can cast spells or activate abilities in response to this choice.
(wotc • 2008-08-01)
Rulings
When the "enters" ability resolves, you choose the value of X, pay for it, and put the tokens onto the battlefield. You can activate mana abilities to pay for {X}, but no one can cast spells or activate abilities in response to this choice.
(wotc • 2008-08-01)