msem-instigator

Reach
Towering Silkweaver can block an additional creature each combat.

Trample
At the beginning of your upkeep, return another creature you control to its owner's hand.

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.)
Towering Wickerman can't be blocked by creatures with power 2 or less.
Whenever a creature merges with Towering Wickerman, put two +1/+1 counters on it.

{1}{W}, Sacrifice Town Elder: Return target artifact or enchantment card from your graveyard to your hand.

Choose one —
• Town Justice deals damage to target creature or planeswalker equal to the greatest power among Citizens and Peasants you control.
• Town Justice deals damage to target creature or planeswalker equal to the number of Citizens and/or Peasants you control.

As an additional cost to cast this spell, exile any number of cards from your graveyard. This spell costs {1} less to cast for each card exiled this way.
All creatures get -3/-3 until end of turn.

Deathtouch
Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)

Toxic Jungle enters the battlefield tapped unless you have 15 or less life.
{T}: Add {B} or {G}.

Deathtouch

Whenever Toxic Lurker attacks, you may have target creature defending player controls get -2/-1 until end of turn.

Whenever Toxic Miscreant deals combat damage to a player, that player discards a card.

As Toxic Spring enters the battlefield, you may tap an untapped creature you control. If you don't, Toxic Spring enters the battlefield tapped.
{T}: Add {U} or {B}.

Search your library for a land card, put it onto the battlefield tapped, then shuffle.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, untap that land.

Enchant creature you control
Whenever a land enters the battlefield under your control, put a +1/+1 counter on enchanted creature.
{3}{G}, Sacrifice Trace the Oasis: Draw cards equal to enchanted creature's power.

Equipped creature gets +0/+2.
When equipped creature dies, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Equip {1}

Enchant creature
Enchanted creature has hexproof.
{U}: Enchanted creature can't be blocked by target creature this turn.

Untap target creature. It gets +2/+2 and gains hexproof until end of turn.

Vision (Whenever this or another creature enters the battlefield under your control, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Tracker of Wild Places envisions a creature card, you may untap a permanent you control.

Search your library for a creature card, reveal it, then shuffle and put that card second from the top.

Target creature you control fights target creature you don't control, then fights it again.

Flash
When Trade Route Bandit enters the battlefield, you may have each player draw two cards.

Frenzy 1 (Whenever this creature attacks and isn't blocked, it gets +1/+0 until end of turn.)
Whenever Trading Traitor deals combat damage to a player, you lose life equal to the number of unblocked attacking creatures you control and draw that many cards.

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
I, II — Mill two cards. You gain 2 life. (Put the top two cards of your library into your graveyard.)
Discovery — During each of your turns, you may cast a permanent spell from your graveyard.

You draw a card, lose 2 life, then create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Rapport — Whenever Trae, Serpent's Grasp and at least one other creature you control become tapped, each player draws a card. Then Trae, Serpent's Grasp deals 2 damage to each opponent with four or more cards in hand.