Vigilance
Whenever Dark Ambassador attacks, exile up to one target creature, then return that card to the battlefield tapped under its owner's control.

Dark Horizon enters tapped.
{T}: Add {C} or {B}.
{1}, Discard Dark Horizon: Scry 2.

Return target permanent card with an activated ability from your graveyard to the battlefield. You may activate its abilities this turn as though it had haste.

This artifact enters tapped.
{T}: Add one mana of any color. Spend this mana only to cast Subroutine spells.
{4}, {T}: Draw a card. This ability costs {1} less to activate for each time a Subroutine ran under your control this turn.

When Data Weaver enters, integrate the top two cards of target opponent's library.
Once during each of your turns, you may play a card integrated onto a permanent you control, and mana of any type can be spent to cast it.

Target player discards two cards. Exile their graveyard.

First strike
Whenever Dated Mechanoid becomes tapped, another target creature you control gets +1/+1 until end of turn.

Exile all creatures and all cards from each player's hand. Any player may play those cards during their turn for as long as they remain exiled, and mana of any type can be spent to cast those spells.
Exile Dawn of Peace.

Ward {2}
Amity — Whenever you attack with Dazzling Performer and exactly one other creature, put a +1/+1 counter on each of those creatures. Until end of turn, they gain trample and “Whenever this creature deals combat damage to a player, draw a card.”

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards and create a Treasure token.

Lifelink
Corrupt — When this creature enters, return target creature card from your graveyard to your hand. If you cast this creature and you control a permanent with greater mana value than this creature, return that card to the battlefield instead.

When Deathcap Guardian enters, exile any number of permanent cards from your graveyard. When you do, put X +1/+1 counters on Deathcap Guardian and up to one target creature gets -X/-X until end of turn, where X is the number of cards exiled this way.

Trample
Other creatures you control have trample.
When this creature dies, it deals 5 damage to target opponent unless they have you draw two cards.

Deathtouch
{1}, {T}: Create a Treasure token.

You may cast this spell as though it had flash by sacrificing a creature in addition to its other costs. If you do, when it enters, attach it to target creature you control.
Equipped creature gets +2/+0 and has “Whenever this creature deals combat damage to a player, that player discards a card.”
Equip—Pay 2 life.

You may choose this spell's targets at random. If you do, it costs {2} less to cast.
Return target instant or sorcery card from your graveyard to your hand.
Flashback {6}{R}

Equipped creature gets +2/+0.
Whenever equipped creature attacks, make a pledge.
Equip {3}

{2}{U}, {T}: Draw a card.
{6}{U}{U}, {T}: Draw four cards.

Enchanted creatures you control get +2/+2 until end of turn. Other creatures you control get +2/+0 until end of turn.

Trample
When this creature dies, exile the top five cards of your library. Until the end of your next turn, you may cast a nonland card from among them by paying life equal to its mana value rather than pay its mana cost.

Deepcavern Scyllia enters with X +1/+1 counters on it.
You may cast Deepcavern Scyllia from your graveyard by paying {3}{G} and exiling X other permanent cards from your graveyard rather than paying its mana cost.

Deeplife Cavern enters tapped unless you control a Forest.
{T}: Add {U} or {B}.

Whenever Deeptreader Arcanist attacks, you may draw a card. If you do, discard a card.

Enchant creature
You control enchanted creature.
Enchanted creature has decayed.

Flash
When this creature enters, if it was cast, counter target noncreature spell unless its controller pays {1} for each creature you control.