Destroy target artifact, target creature, target enchantment, and target land.

When Deepglow Skate enters the battlefield, double the number of each kind of counter on any number of target 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.

Return all nonland permanents to their owners' hands.
Miracle (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

Dimir Aqueduct enters the battlefield tapped.
When Dimir Aqueduct enters the battlefield, return a land you control to its owner's hand.
: Add .

Counter target spell with converted mana cost 4 or greater.

Dismal Backwater enters the battlefield tapped.
When Dismal Backwater enters the battlefield, you gain 1 life.
: Add or .

, , Sacrifice Dispeller's Capsule: Destroy target artifact or enchantment.

Undaunted (This spell costs less to cast for each opponent.)
Exile two target creatures. For each of those creatures, its controller reveals cards from the top of their library until they reveal a creature card, puts that card onto the battlefield, then shuffles the rest into their library.

Flying
Whenever Dragon Mage deals combat damage to a player, each player discards their hand, then draws seven cards.

Dragonskull Summit enters the battlefield tapped unless you control a Swamp or a Mountain.
: Add or .

: Add .
, : Put a storage counter on Dreadship Reef.
, Remove X storage counters from Dreadship Reef: Add X mana in any combination of and/or .

Whenever one or more creatures attack, you may have target attacking creature gain double strike until end of turn.

Choose up to one creature. Destroy the rest.

Whenever a creature deals combat damage to one of your opponents, its controller may draw a card.

When Elite Scaleguard enters the battlefield, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)
Whenever a creature you control with a +1/+1 counter on it attacks, tap target creature defending player controls.

Equipped creature gets +1/+1 for each card in your hand.
Equip

Flying
Whenever one or more +1/+1 counters are put on another creature you control, you may put a +1/+1 counter on Enduring Scalelord.

Target player sacrifices an attacking creature. You create X 1/1 white Soldier creature tokens, where X is that creature's toughness.

Counter target multicolored spell.