Sword of Light and Shadow [Darksteel] Magic 2015 Clash Pack Set: Time Spiral Timeshifted Type:

Set: Time Spiral Timeshifted Type: Enchantment Rarity: Rare Cost: {1}{R}{G} {2}

They only specify the consequences should you fail

that player sacrifices a creature or planeswalker

Set: Legends Type: Creature — Kobold Rarity: Rare Cost: {1}{R} First strike

Morph {3}{B} (You may cast this card face down as a 2/2 creature for {3}

Sword of Light and Shadow [Darksteel] Magic 2015 Clash Pack Set: Time Spiral Timeshifted Type:Set: Darksteel Type: Artifact Equipment Rarity: Rare Cost: {3} Equipped creature gets +2 +2 and has protection from white and from black. Whenever equipped creature deals combat damage to a player, you gain 3 life and you may return up to one target creature card from your graveyard to your hand. Equip {2}