msem-instigator

Motivate 2 (When this creature enters, you may motivate target creature with less power than this by putting two +1/+1 counters on it.)

Sunrazed Ruins enters tapped.
{T}: Add {W}.
{2/W}{2/W}: Sunrazed Ruins becomes a 2/3 white Elemental creature with lifelink until end of turn. It's still a land.

Trample
Vanishing 3 (This creature enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

Enchant creature
Enchanted creature gets +1/+1.
Whenever enchanted creature deals damage to a player or planeswalker, draw a card.

Whenever you cast a green or blue spell, create a 1/1 green and blue Elemental creature token.
Each Elemental you control enters with an additional +1/+1 counter on it.

Choose one, then choose another for each card named Unraveling in your graveyard.
• Counter up to one target spell.
• Scry 2, then draw a card.
• Up to three target lands your opponents control don't untap during their controller's next untap step.
• Creatures your opponents control get -4/-0 until end of turn.

As Rhythm of Danaj enters, choose Martoob or Tamaak.
• Martoob — At the beginning of your end step, return a nonland card at random from your graveyard to your hand.
• Tamaak — At the beginning of your end step, you may sacrifice a creature. If you do, draw cards equal to its power.

Reach
When Ironclad Sentry enters, you may return target permanent card not named Ironclad Sentry from your graveyard to your hand.

Indestructible
Ghrin-Danu, the Dawnhart can't attack or block unless you control three other creatures with different powers.
Whenever you attack, put a +1/+1 counter on up to one other target creature you control.

Trample
When Feral Devout enters, choose one —
• Put a +1/+1 counter on Feral Devout.
• Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

When Pensive Muse enters, create a white Aura enchantment token named Seal's Love attached to target creature you control. The token has enchant creature and “Enchanted creatures you control get +1/+1.”

When Ingredient Scroungers enters, if you control a creature with deathtouch, return target permanent card from your graveyard to your hand.

Once each turn, when you activate a nonmana ability, you may gain 1 life and draw a card.
{2}{W}{U}: You may tap or untap target creature or artifact.

Each opponent loses 1 life and you gain 1 life. Surveil 2.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Flying
When Dreadworld Demon enters, each opponent may have you draw a card. Each player who doesn't loses 3 life. You gain life equal to the life lost this way.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Create a Treasure token.
3 — Create a tapped and attacking 5/5 red Dragon creature token with flying. Exile it at the beginning of the next end step.
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Codex — Earthcraft; Enchantress's Presence; Dream Halls; Energy Field; Eldrazi Conscription. (As this enters, conjure its contents into a shuffled face-up additional library.)
You can't draw from this codex's library.
If a permanent you control would explore, you may put a card from this codex's library into your hand instead.

Shuffle the cards from your hand into your library, then draw that many cards.
Draw a card.

Trample
When Descendant of Shimaru enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Target creature gets +1/+0 and gains first strike until end of turn.
Draw a card.

When Runebreaker Mage enters, return another target nonland permanent you control and target nonland permanent you don't control to their owner's hands.

Exile target creature. Its controller loses 3 life.

Sacrifice a creature: Look at the top card of target player's library. You may have that player put that card into their graveyard.

Sunrise River enters tapped.
{T}: Add {U}.
You may untap Sunrise River during each other player's untap step. Whenever you do, you lose 1 life.

When Edina's Soulsinger enters, create a 1/1 blue Jellyfish enchantment creature token with slipstream. (It can't be blocked as long as only creatures with slipstream are attacking.)