msem-instigator

Trample
When Saddlesaur Guide enters, create a green Aura enchantment token named Hefty Load attached to target creature. The token has enchant creature and “Enchanted creature gets +2/+2 and has trample.”

When Satisfied Gleaner enters, you may search your library for a basic land card, put it onto the battlefield, then shuffle.

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.

{T}: Add one mana of any color. Activate only if Shinrin Sage is enchanted, equipped, or has a card inscribed onto it.

Whenever a land you control enters, you gain 1 life.
{3}{G}, Sacrifice Sower of Spring: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Deathtouch

Whenever Student of the Coil attacks, target creature gains poisonous 1 until end of turn. (Whenever that creature deals combat damage to a player, that player gets a poison counter.)

Tortle Traveler enters tapped.
When Tortle Traveler enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

When Vasille Rioters enters, conjure three cards named Vasille Rioters and shuffle them into your library, then you get a riot counter.
Vasille Rioters gets +1/+1 for each riot counter you have.

When Verendas Spiritwalker enters, you may put a +1/+1 counter on target creature.

{2}{G}, {T}: Another target creature you control gets +2/+2 until end of turn.

Whenever Warrior of Far-Off Sands attacks, it gets +1/+1 until end of turn for each creature you control that's enchanted or equipped.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Vigilance
{X}{G}, {T}: Ylda, the Wild Soul becomes a copy of target creature you control with mana value X, except it has this ability and vigilance. Activate only as a sorcery.

Creatures with power greater than Dashing Rogue's power can't block it.

Whenever Haunted Prodigy attacks, you may tap target creature.
Unveil {2}{W}{U} ({2}{W}{U}: Transform this. Unveil only as a sorcery.)

Noncreature spells your opponents cast cost {1} more to cast.
Unveil {2}{W}{U} ({2}{W}{U}: Transform this. Unveil only as a sorcery.)

Flying
Whenever Warden of the Divine Court attacks, creatures in its pack get +1/+1 until end of turn. (Two or more creatures you control with equal power are in a pack.)

{U}{B}, {T}: Draw a card, then each player exiles the top card of their library. Then if a player owns two or more cards exiled with Arina, Volarian Explorer, exile her, then return her to the battlefield transformed under her owner's control.

Deathtouch
When Vizier of Lies enters, you may return target instant or sorcery card from your graveyard to your hand.

Whenever Heedless Astronaut attacks, it gets +2/+0 and gains indestructible until end of turn.

When Duchess Odelia VII enters, search your library for a nonland permanent card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

Whenever you cast your first creature spell each turn, you may pay {1}. If you do, create a 1/1 colorless Spirit creature token.

{U}{R}, {T}: Fulmen deals 1 damage to target creature. When a creature dealt damage this way dies this turn, draw a card.
Whenever you cast an instant or sorcery spell, if you cast another instant or sorcery spell this turn, exile Fulmen, then return him to the battlefield transformed under his owner's control. He deals 3 damage to each creature.

When Mountain-Western Inventor enters, you may return target artifact card from your graveyard to your hand.
{1}, Sacrifice an artifact: Target creature can't block or be blocked this turn.