Doomsday [Masters 25] Sliver

Doomsday [Masters 25] SliverSet: Masters 25 Type: Sorcery Mythic Cost: {B}{B}{B} Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.

Set: Portal Three Kingdoms Type: Instant Rarity: Uncommon Cost: {W} Cast this spell only during the declare attackers step and only if you've been attacked this step

or enchantment

"All warfare is based on deception

cast it for its madness cost or put it into your graveyard

Discard this card: Search your library for a Plains card

All things will crumble

{4}: Put a +1/+1 counter on Walking Ballista

but I didn't expect it from the building itself

target opponent chooses self or others

Release it

Goblins Type: Land Uncommon Cost: {T}: Add {C}

Set: Arena League 2000 Type: Sorcery Rarity: Rare Cost: {1}{R}{R} Destroy target artifact or land