Maelstrom of the Spirit Dragon

: Add .

: Add one mana of any color. Spend this mana only to cast a Mount spell.

, : Look at the top card of your library. If it's a Mount card, you may reveal it and put it into your hand. If you don't put it into your hand, you may put it on the bottom of your library.

: Add .

: Add one mana of any color. Spend this mana only to cast a Dragon creature spell.

, , Sacrifice this land: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.

: Add .

Whenever you cast a colorless spell with mana value 7 or greater, you may sacrifice this land. If you do, search your library for a colorless creature card, reveal it, put it into your hand, then shuffle.

: Add .

: Add one mana of any color. Spend this mana only to cast an Ally spell.

, , Sacrifice this land: Return target Ally you control to its owner's hand.

As this land enters, you may reveal an Elemental card from your hand. If you don't, this land enters tapped.

: Add .

: Add one mana of any color. Spend this mana only to cast an Elemental spell or activate an ability of an Elemental.

This land enters tapped.

: Add .

, , Sacrifice this land: Search your library for an Aura card and/or an Equipment card, reveal them, put them into your hand, then shuffle.