Mana Short [Beta Edition] Magic 2015 Clash Pack "The key to unlocking this

"The key to unlocking this puzzle is within you

Set: Ixalan Prerelease Promos Type: Creature — Merfolk Warrior Rarity: Rare Cost: {3}{U} Creatures you control with +1/+1 counters on them can't be blocked

Set: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {6} {8}

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Rarity: Rare Cost: {2}{U}{U} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Mana Short [Beta Edition] Magic 2015 Clash Pack "The key to unlocking thisSet: Beta Edition Type: Instant Rarity: Rare Cost: {2}{U} Tap all lands target player controls and that player loses all unspent mana.