(Ancient Den isn't a spell.)

: Add .

Vigilance

Metalcraft — Ardent Recruit gets +2/+2 as long as you control three or more artifacts.

Adamant — If at least three white mana was spent to cast this spell, Ardenvale Paladin enters the battlefield with a +1/+1 counter on it.

: Target creature gets +X/+X until end of turn, where X is Auriok Bladewarden's power.

Whenever a creature you control deals combat damage to a player, you may draw a card.

, : Creatures your opponents control attack this turn if able.

Eldrazi Spawn creatures you control get +2/+1.

Target player loses 1 life for each tapped artifact they control.

Castle Ardenvale enters the battlefield tapped unless you control a Plains.

: Add .

, : Create a 1/1 white Human creature token.

Target creature gets +4/+4 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

+1: Target player draws two cards, then discards two cards.

−2: Gain control of target artifact.

−6: You get an emblem with "Whenever you cast a spell that targets one or more permanents, gain control of those permanents."

Creatures with power less than Den Protector's power can't block it.

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

When Den Protector is turned face up, return target card from your graveyard to your hand.

When Denizen of the Deep enters the battlefield, return each other creature you control to its owner's hand.

Creatures can't be the targets of spells.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Return target permanent to its owner's hand.

Search target player's library for up to seven cards and exile them. Then that player shuffles their library.

: Devkarin Dissident gets +2/+2 until end of turn.

Tap up to two target creatures. (Then exile this card. You may cast the creature later from exile.)

Prevent the next 4 damage that would be dealt this turn to any number of targets, divided as you choose.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Whenever another creature enters the battlefield, you gain 1 life.

Counter target spell.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

If you would draw a card, return a card from your graveyard to your hand instead. If you can't, you lose the game.

If a card would be put into your graveyard from anywhere, exile that card instead.

: Add one mana of any color.

Whenever you tap Forbidden Orchard for mana, target opponent creates a 1/1 colorless Spirit creature token.

Whenever another red creature enters the battlefield under your control, Foundry Street Denizen gets +1/+0 until end of turn.

Flying

Other Spirit creatures you control get +0/+1.

: Target creature gets +1/+1 until end of turn.

When Golden Egg enters the battlefield, draw a card.

, , Sacrifice Golden Egg: Add one mana of any color.

, , Sacrifice Golden Egg: You gain 3 life.

: Add .

You may choose an artifact or enchantment card you own from outside the game, reveal that card, and put it into your hand. Exile Golden Wish.

Constellation — Whenever Goldenhide Ox or another enchantment enters the battlefield under your control, target creature must be blocked this turn if able.

Grenzo, Dungeon Warden enters the battlefield with X +1/+1 counters on it.

: Put the bottom card of your library into your graveyard. If it's a creature card with power less than or equal to Grenzo's power, put it onto the battlefield.

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

: Add .

, Sacrifice Heart Warden: Draw a card.

Lifelink

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

When Hidden Dragonslayer is turned face up, destroy target creature with power 4 or greater an opponent controls.

When an opponent casts an artifact spell, if Hidden Guerrillas is an enchantment, Hidden Guerrillas becomes a 5/3 Soldier creature with trample.

When an opponent plays a nonbasic land, if Hidden Herd is an enchantment, Hidden Herd becomes a 3/3 Beast creature.

Green creatures have forestwalk. (They can't be blocked as long as defending player controls a Forest.)

Put a card from your hand on top of your library: Prevent all damage that would be dealt by target instant or sorcery spell this turn.

Whenever an opponent plays a land, if Hidden Stag is an enchantment, Hidden Stag becomes a 3/2 Elk Beast creature.

Whenever you play a land, if Hidden Stag is a creature, Hidden Stag becomes an enchantment.

You may tap or untap target permanent, then you may tap or untap another target permanent.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

At the beginning of your upkeep, you gain 2 life for each Shrine you control.

At the beginning of your upkeep, create a 1/1 colorless Spirit creature token for each Shrine you control.

At the beginning of your upkeep, draw a card for each Shrine you control.

Whenever Identity Thief attacks, you may exile another target nontoken creature. If you do, Identity Thief becomes a copy of that creature until end of turn. Return the exiled card to the battlefield under its owner's control at the beginning of the next end step.

Prevent all damage that Indentured Oaf would deal to red creatures.

At the beginning of your upkeep, sacrifice two Swamps. If you can't, tap Infernal Denizen, and an opponent may gain control of a creature you control of their choice for as long as Infernal Denizen remains on the battlefield.

: Gain control of target creature for as long as Infernal Denizen remains on the battlefield.

Whenever another green creature enters the battlefield under your control, put a +1/+1 counter on target creature.

The first face-down creature spell you cast each turn costs less to cast.

Whenever a face-down creature enters the battlefield under your control, draw a card.