When this creature enters, you may sacrifice a land. If you do, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

: Target permanent becomes an artifact in addition to its other types. (This effect lasts indefinitely.)
: Gain control of target artifact. (This effect lasts indefinitely.)

Flying, trample
At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Destroy target artifact or enchantment.

Flying
: Exile the top card of your library. Until end of turn, you may play that card. (Reveal the card as you exile it.)

+1: Untap target Mountain. It becomes a 4/4 red Elemental creature until end of turn. It's still a land.
−2: Add for each Mountain you control.
−5: You get an emblem with "Mountains you control have ': This land deals 1 damage to any target.'"

This land enters tapped. As it enters, choose a color.
: Add one mana of the chosen color.
: Add two mana of the chosen color. Spend this mana only to activate abilities of land sources.

( can be paid with either or .)
Other permanents you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Lifelink
Noncreature spells your opponents cast cost more to cast.

(: Add .)

Whenever the Ring tempts you, if you chose a creature other than Aragorn as your Ring-bearer, put your choice of a counter from among first strike, vigilance, deathtouch, and lifelink on Aragorn.
Whenever you put one or more counters on Aragorn, put one of each of those kinds of counters on up to one other target creature.

Mines of Moria enters tapped unless you control a legendary creature.
: Add .
, , Exile three cards from your graveyard: Create two Treasure tokens.

Trample
Whenever a creature you control deals combat damage during your turn, put that many +1/+1 counters on it. (It must survive to get the counters.)
You may cast this card from your graveyard by removing six counters from among creatures you control in addition to paying its other costs.

This land enters with a shield counter on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)
: Add .
: Move a shield counter from this land onto target creature. Activate only if two or more creatures entered the battlefield under your control this turn.

Whenever an opponent draws a card, Ob Nixilis deals 1 damage to that player.
−2: Destroy target creature. Its controller draws two cards.

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)
Artifacts and creatures your opponents control enter tapped.

Haste
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, destroy target land.

This spell costs less to cast for each instant and sorcery card in your graveyard.
You have no maximum hand size.
At the beginning of your upkeep, put a knowledge counter on The Magic Mirror, then draw a card for each knowledge counter on The Magic Mirror.

Vigilance

When this creature enters, draw a card.