Leyline of the Void [Guildpact] San Diego Comic-Con 2015 creatures can't block unless their

creatures can't block unless their controller pays {1} for each of those creatures

the battle is its own purpose

you may reveal this card from your hand and pay its splice cost

As dangerous in the gambling hall as he is in battle

Set: Torment Type: Sorcery Rarity: Uncommon Cost: {1}{B} Target player sacrifices a creature

Leyline of the Void [Guildpact] San Diego Comic-Con 2015 creatures can't block unless theirSet: Guildpact Type: Enchantment Rarity: Rare Cost: {2}{B}{B} If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield. If a card would be put into an opponent's graveyard from anywhere, exile it instead. Where treachery and oblivion converge.