See the Unwritten [Khans of Tarkir] Scars of Mirrodin you may put a Soldier

you may put a Soldier creature card from your hand onto the battlefield tapped and attacking

Kolaghan Forerunners's power is equal to the number of creatures you control

Pay 50 life: Aetherflux Reservoir deals 50 damage to any target

Set: Eighth Edition Type: Enchantment Rarity: Rare Cost: {B}{B}{B} {B}{B}

if it was a creature

See the Unwritten [Khans of Tarkir] Scars of Mirrodin you may put a SoldierSet: Khans of Tarkir Type: Sorcery Rarity: Mythic Cost: {4}{G}{G} Reveal the top eight cards of your library. You may put a creature card from among them onto the battlefield. Put the rest into your graveyard. Ferocious If you control a creature with power 4 or greater, you may put two creature cards onto the battlefield instead of one.