, Sacrifice another creature or artifact: Ayara, Widow of the Realm deals X damage to target opponent or battle and you gain X life, where X is the sacrificed permanent's mana value.

: Transform Ayara. Activate only as a sorcery. ( can be paid with either or 2 life.)

Search your library for up to X basic land cards, where X is the number of lands you control, put them onto the battlefield tapped, then shuffle.

Each player shuffles all creatures they own into their library. Each player who shuffled a nontoken creature into their library this way reveals cards from the top of their library until they reveal a creature card, then puts that card onto the battlefield and the rest on the bottom of their library in a random order.

Return target nonland permanent to its owner's hand.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

If a triggered ability of a permanent you control triggers, that ability triggers an additional time.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

: The next time a black or red source of your choice would deal damage to you this turn, prevent that damage.

+1: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.

−3: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control.

−6: You get an emblem with "Swamps you control have ‘: Add .'"

When Prison Realm enters, exile target creature or planeswalker an opponent controls until Prison Realm leaves the battlefield.

When Prison Realm enters, scry 1.

Realm Seekers enters with X +1/+1 counters on it, where X is the total number of cards in all players' hands.

, Remove a +1/+1 counter from Realm Seekers: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Enchant artifact or creature

Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.

Search your library for up to four land cards with different names and reveal them. An opponent chooses two of those cards. Put the chosen cards into your graveyard and the rest into your hand. Then shuffle.

Changeling (This card is every creature type.)

As Realmwalker enters, choose a creature type.

You may look at the top card of your library any time.

You may cast creature spells of the chosen type from the top of your library.

Put all creature cards from all graveyards onto the battlefield under your control.

Whenever a permanent an opponent controls is put into a graveyard from the battlefield, put a +1/+1 counter on Sarulf, Realm Eater.

At the beginning of your upkeep, if Sarulf has one or more +1/+1 counters on it, you may remove all of them. If you do, exile each other nonland permanent with mana value less than or equal to the number of counters removed this way.

Flying

Whenever Sustainer of the Realm blocks, it gets +0/+2 until end of turn.

At the beginning of each player's upkeep, that player chooses artifact, creature, land, or non-Aura enchantment. All nontoken permanents of that type phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

If you would draw a card, instead look at the top three cards of your library, then put one into your hand and the rest into your graveyard.

Pay 4 life: Underrealm Lich gains indestructible until end of turn. Tap it.