Sudden Impact

Sudden Impact deals damage to target player equal to the number of cards in that player's hand.

Dormant Volcano

This land enters tapped.
When this land enters, sacrifice it unless you return an untapped Mountain you control to its owner's hand.
{T}: Add {C}{R}.

Gone

Return target creature you don't control to its owner's hand.

Dead

Dead // Gone

Barrel Down Sokenzan

Sweep — Return any number of Mountains you control to their owner's hand. Barrel Down Sokenzan deals damage to target creature equal to twice the number of Mountains returned this way.

Browbeat

Any player may have Browbeat deal 5 damage to them. If no one does, target player draws three cards.

Mountain

Risk Factor

Target opponent may have Risk Factor deal 4 damage to them. If that player doesn't, you draw three cards.
Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Spiraling Embers

Spiraling Embers deals damage to any target equal to the number of cards in your hand.

Humble Defector

{T}: Draw two cards. Target opponent gains control of this creature. Activate only during your turn.

Sokenzan Renegade

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)
At the beginning of your upkeep, if a player has more cards in hand than each other player, the player who has the most cards in hand gains control of this creature.