msem-instigator

Create a 2/2 black Zombie creature token.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Stampede — Whenever Cloud's Roar Avenger and a creature with greater power attack, tap up to one target creature.

Cloudcover Heights enters the battlefield tapped unless you control a Forest.
{T}: Add {R} or {W}.

Flying
When Cloudheath Sentinel enters the battlefield, return target artifact card with mana value 2 or less from your graveyard to the battlefield.

Embellish {2}{U} (If you cast this spell for {2}{U}, create a 1/1 blue Thopter artifact creature token with flying when it enters the battlefield.)
{T}: Target player mills a card. If you control three or more artifacts, that player mills three cards instead.

When Conduit of the Conflux enters the battlefield, scry 2.
{T}: Add one mana of any color.

When Conflux Ravager enters the battlefield, destroy target nonland permanent an opponent controls.
Cycling {2} ({2}, Discard this card: Draw a card.)

Create three 1/1 white Soldier creature tokens. Scry 3.

Enchant creature
Enchanted creature gets +2/+1 and has “Whenever this creature attacks, target creature an opponent controls can't block this turn.”

Menace
Whenever you cast an instant or sorcery spell, create a 2/2 black Zombie creature token. This ability triggers only once each turn.

Cosmic Catastrophe deals 6 damage to target creature or planeswalker. If you control a creature with power greater than its base power, Cosmic Catastrophe deals 3 damage to each opponent.

Crumbling Necropolis enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.

Cryptic Reef enters the battlefield tapped.
{T}: Add {G} or {U}.
{2}{G}{U}, {T}, Sacrifice Cryptic Reef: Draw a card.

Flying
Whenever one or more counters are put on a creature you control, Curio Siren gets +1/+0 until end of turn.

Menace
When Dagger-Thrash Marauders enters the battlefield, you may have it consume. If you do, put a +1/+1 counter on it and it gains haste until end of turn. (To consume, sacrifice another creature or exile a creature card from your graveyard.)

Flying
Heroic — Whenever you cast a spell that targets Dawnbringer Vanguard, tap target creature an opponent controls.

Lifelink

Flying, lifelink
When Daystrider Pegasus enters the battlefield, exile another target non-Pegasus permanent you control, then return it to the battlefield under its owner's control.

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

Whenever you scry, tap target creature an opponent controls.
{2}{W}{U}: Scry 1. You gain 1 life.

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
Each creature you control with a counter on it has ward {2}. (If a creature has multiple instances of ward, each triggers separately.)

Create a 4/4 black Demon creature token with flying. You lose 3 life for each Demon you control.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Flying
When Derevi's Adjutant enters the battlefield, put a +1/+1 counter on each other creature you control.
Cycling {2} ({2}, Discard this card: Draw a card.)
When you cycle Derevi's Adjutant, exile it. You may cast it from exile for as long as it remains exiled.

Counter target nonenchantment spell.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. Scry 1.