Koth, Volcanic Geezer
[+1]: You may sacrifice a Mountain. If you do, produce
and draw a card.
[-2]: Return target Mountain card from your graveyard to the battlefield. It becomes a 3/3 red Elemental creature with haste. It's still a land.
[-6]: You get an emblem with "Whenever a Mountain you control dies, it deals 3 damage to target creature or player."
Artifact -- Equipment
Equipped creature has first strike and gets +X/+0, where X is the number of Mountains you control.
[+1]: Untap target permanent. Draw a card.
[-2]: Tap up to two target permanents. They don't untap during their controllers' next untap step.
[-5]: You get an emblem with "Whenever you cast a spell, summon a 1/1 blue Illusion creature."
Gorkhhesh, Usher of Ashes
[+3]: ~ deals 4 damage to target creature or player.
[-X]: Destroy target nonland permanent with converted mana cost X. Its controller loses X life and you gain X life.
[-10]: Return up to five permanent cards from any graveyards to the battlefield under your control. They gain haste until end of turn.
Kara, Radiant Aura
[+1]: Until your next turn, you may cast enchantment cards as though they had flash.
[-2]: Return target enchantment card from your graveyard to the battlefield.
[-7]: You get an emblem with "Each enchanted creature you control gets +3/+3 and has indestructible and vigilance."
When ~ enters the battlefield, exile target creature until ~ leaves the battlefield.
When ~ enters the battlefield, gain 3 life.
Kiora, Abyssal Explorer
[+1]: Draw a card. You may reveal it. If it's a land card, draw another card.
[-2]: Reveal the bottom card of your library until a creature card is revealed this way. Put that creature card onto the battlefield.
[-8]: Reveal the top seven cards of your library. Put all such land cards onto the battlefield tapped and the rest into your hand.
is a Kraken Horror planeswalker. He terrorizes the seas and consumes entire fleets. This card is a control finisher.
Hafgufa, Seamen Swallower
[+2]: Target player discards all the cards in his or her hand, then draws that many cards.
[-2]: Return target permanent to its owner's hand. Target player discards a card.
[ 0]: Until end of turn, ~ becomes a 8/8 Kraken Horror creature with hexproof and trample that's still a planeswalker. Prevent all damage that would be dealt to him this turn.