msem-instigator

When Shepherd of Lonely Souls dies, you may return target creature card with mana value 4 or less from your graveyard to your hand.

Shepherd of the People can't be blocked by creatures with power 2 or less.
Whenever another Citizen or Peasant you control enters, Shepherd of the People gets +1/+1 until end of turn.

Whenever a land you control enters, you may tap target creature.

Art of war — At the beginning of your end step, if Sheraku Elite dealt damage to an opponent this turn, put a +1/+1 counter on it.

Choose two —
• Target creature gets +2/+0 until end of turn.
• Two target creatures can't block this turn.
• Target player discards two cards, then draws a card for each card they discarded this way.
• Shi Hou's Command deals 4 damage to target legendary creature or planeswalker.

Put a lifelink counter on target creature you control. It deals damage equal to its power to another target creature or planeswalker.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
Ward—Discard a card.
{B}{R}: Demigod — Draw a card, then discard a card. You may have each opponent sacrifice a nonland permanent with the same mana value as the discarded card.
{4}{B}{R}: God — Create two tokens that are copies of Shi Hou's back face.

Whenever Shianne's Guardian or another creature you control enters, you may pay {1}{R}{G}. When you do, that creature deals damage equal to its power to any target.

Archive 7 (As this enters, shuffle the top seven cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
As long as you control five or more creatures, you may play permanent cards from the archived library.

[+1]: Create two 1/1 red Satyr creature tokens.
[–1]: Until your next turn, target creature has base power and toughness X/X, where X is the number of permanents you control.
[–8]: Reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield, then repeat this process.

Other creatures you control get +0/+1.
Whenever a creature you control perseveres, you gain 1 life. (A creature perseveres when it survives damage.)

Tap a creature you control: Prevent the next 2 damage that would be dealt by target creature this turn.
Tap a Reflection creature you control: Prevent all damage that would be dealt this turn by a source of your choice.

When Shield of the Unwavering enters, attach it to target creature you control.
Equipped creature gets +2/+2 and has vigilance.
Equip {3}

Exile target creature. Its controller gains 3 life.

Enchant creature
Enchanted creature gets +0/+2 and can block an additional creature each combat.

Target player discards a card.
Monument {1}{B} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

Exile all nontoken creatures. For each creature exiled this way, return that card to the battlefield under a random player's control.

Gestalt (When this or another creature enters under your control, you may merge it with the one in play, keeping counters and attachments. They become the permanent on top plus all abilities from under it.)
Trample
{1}, Discard Shifting Brute: Add one mana of any color. Scry 1.

{T}: Add {C}.
{1}, {T}, Sacrifice Shifting City: Search your library for a basic land or Satrapy card, put it onto the battlefield tapped, then shuffle.

Prowess
{1}: Shifting Dweller gets +1/-1 until end of turn.

{T}: Add {C}.
{2}, {T}, Sacrifice Shifting Frontiers: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Search your library for a Desert card or a land card with a basic land type and put it onto the battlefield tapped, then shuffle.

Wanderlust — Return target nonland permanent to its owner's hand. If you control four or more differently named lands, you may aetherize that permanent. (To aetherize, create a token that's a copy of it, then exile that token.)

Flying
When Shiftscale Drake enters, look at the top card of your library. You may put that card into your graveyard.