msem-instigator

Flying
Spirited (When this creature enters the battlefield, you may activate one of its activated abilities without paying its costs.)
{3}{U/B}{U/B}: Look at the top card of target opponent's library, then exile it face down. You may play that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell.

{2}: Avaricious Ghul gets +1/+1 until end of turn. If mana from a Treasure was spent to activate this ability, put a +1/+1 counter on Avaricious Ghul instead.

Target creature can't block this turn. (Then exile this card. You may cast the creature later from exile.)

Deathtouch
Tribute 3 (As this creature enters the battlefield, an opponent of your choice may put three +1/+1 counters on it.)
When Avatar of Amosis enters the battlefield, if tribute wasn't paid, you may destroy target creature.

Menace (This creature can't be blocked except by two or more creatures.)
Avatar of Basat can't block.

Each other colorless creature you control enters the battlefield with an additional +1/+1 counter on it.

This spell costs {1} less to cast for each artifact and/or enchantment you control.
When Avatar of Innovations enters the battlefield, you may return target artifact or enchantment card from your graveyard to your hand.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Crocodile creatures you control get +1/+1.
Avatar of Senmut and Crocodile creatures you control can't be blocked as long as you control four or more Islands.

Vigilance
Avatar of Utsenchep can block any number of creatures.
All creatures able to block Avatar of Utsenchep do so.

Trample
Avatar of the Groves enters the battlefield with a +1/+1 counter on it for each land you control.
Landfall — Whenever a land enters the battlefield under your control, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Reach, trample
If a +1/+1 counter would be put on another creature you control, instead put a +1/+1 counter on that creature and on Avatar of the Natural.

When Avaz Banner enters the battlefield, attach it to target creature you control.
Equipped creature gets +2/+2 and is a Soldier Army in addition to its other types.
Equip {3}

First strike
When Avaz Cataphract enters the battlefield, judge another target creature you control. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

{T}: Add {C}.
Satrapies you control have “{1}{R}, {T}, Discard a card: Draw a card.”

Avaz Sanctuary enters the battlefield tapped.
Satrapies you control have “{T}: Add {R} or {W}.”

Avaz Temple enters the battlefield tapped.
Satrapies you control have “{T}: Add {R} or {G}.”

Flying
Harmony — Until the end of your next turn, you may cast target instant or sorcery card from your graveyard. If that card would be put into your graveyard, exile it instead.
When Aven Acoustimancer enters the battlefield, harmonize. (Trigger up to one harmony of one permanent you control.)

Flying
When Aven Merchant enters the battlefield, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Kicker {U} (You may pay an additional {U} as you cast this spell.)
Flying
If Aven Ranger was kicked, it enters the battlefield with a +1/+1 counter on it.

Flying
When Aven Strategist enters the battlefield, return up to one target creature to its owner's hand.

Flying
Civilized — Whenever Aven Supervisor deals combat damage to a player, if you control an artifact, a creature, and an enchantment, you may draw a card. If you do, discard a card.

Flying, vigilance

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever a nontoken creature enters the battlefield under your control, you may pay {1}{W}. If you do, create a 1/1 white Bird creature token with flying.

Flying
Whenever Avengeance Angel attacks, you may put a creature card with mana value 2 or less from your hand or graveyard onto the battlefield.