Monday's post from Mark Rosewater revealed a Planeswalker card from Shards of Alara, Sarkhan Vol. We don't see his abilities, but it is confirmation they will exist in the next block. Additionally, they are part of the new "Mythic Rare" rarity, just one of the changes being rolled out for Shards of Alara.

Here are the Planeswalkers as we know them in Shards of Alara:

Elspeth, Knight Errant 2WW

Planeswalker - Elspeth

+1: Put a 1/1 white Soldier creature token into play.

+1: Target creature gets +3/+3 and gains flying until end of turn.

-8: For the rest of the game, all artifacts, creatures, enchantments, and lands you control are indestructible.

Tezzeret the Seeker 3UU

Planeswalker - Tezzeret

+1: Untap up to two target artifacts.

-X: Search your library for an artifact card with converted mana cost X or less and put it into play. Then shuffle your library.

-5: Artifacts you control become 5/5 artifact creatures until end of turn.

Ajani Vengeant 2RW

Planeswalker - Ajani

+1: Target permanent doesn't untap during its controller's next untap step.

-2: Ajani Vengeant deals 3 damage to target creature or player and you gain 3 life.

-7: Destroy all lands target player controls.

Sarkhan Vol 2RG

Planeswalker - Sarkhan

+1: Creatures you control get +1/+1 and gain haste until end of turn.

-2: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.

-6: Put five 4/4 red Dragon creature tokens with flying into play.