msem-instigator

Font of Sorrows and other permanents you control entering the battlefield cause their death knell to trigger.
Death knell — Draw a card. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)

This spell costs {1} less to cast for each other card in your hand.
If you have fewer than seven cards in hand, draw cards equal to the difference.

{T}: Add {W} or {B}.
{T}, Sacrifice Sigil of Martyrdom: Add {W}{B}.

Target creature you control gains lifelink until end of turn. When that creature dies this turn, return it to the battlefield under your control with a +1/+1 counter on it. It becomes a Vampire in addition to its other types.

Trample
Whenever Fellor Razer deals combat damage to a player, that player sacrifices a land.

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, put two of those cards into your hand instead.

Creatures you control have haste.
{4}{R}: Until end of turn, gain control of target creature an opponent controls without a vision counter on it. Untap that creature and put a vision counter on it. Activate only as a sorcery.

As this creature enters, choose a creature type.
This creature is the chosen type in addition to its other types.
Other creatures you control of the chosen type get +1/+0.

When Strength of the Patient enters, if it was revived, put four +1/+1 counters on it.
Revive {4}{W}{W}{W} ({4}{W}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Distribute four +1/+1 counters among up to two target lands you control. Those lands become 0/0 Elemental creatures with haste until end of turn. If you're attacking, tap those lands. They're attacking.
Showcase {3}{R}{G} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

When Hooded Inquirers enters, draw two cards.

Flash
{1}{W}: Return Nimble Explorer to its owner's hand.

Prowess
Wither (This deals damage to creatures in the form of -1/-1 counters.)

When Powercell Cultivator enters, create a tapped colorless Powercell artifact token with “{T}: Add {C}.”
Artifacts you control have “{T}: Add one mana of any color.”

At the beginning of your upkeep, if an opponent controls more creatures than you, you may reveal the top seven cards of your library. Target opponent chooses a creature card revealed this way. Put that card onto the battlefield, and the rest into your graveyard.

Motivate 1 (When this creature enters, you may motivate target creature with less power than this by putting a +1/+1 counter on it.)
When Goriana Tactician enters, you may tap target creature.

({T}: Add {B}.)
As Midnight Gate enters, you may pay 1 life. If you don't, Midnight Gate enters tapped.
Basic lands you control have “{T}: Add {B}.”

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

Gain control of target creature with power less than or equal to the number of different creature types among creatures you control.

Reach, ward {3}

Rhapsody {4}{R}{W} (Pay {4}{R}{W} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Lifelink, haste

Scry 5.

Equipped creature gets +2/+1.
Whenever equipped creature blocks or becomes blocked by a creature, it deals 2 damage to that creature.
Equip {2}

Whenever an Equipment you control enters, attach it to target creature you control.

Flying, ward {1}
Intisuyu's Masterpiece gets +X/+X, where X is the number of artifacts and/or enchantments you control.