msem-instigator

Whenever another artifact you control enters, put a +1/+1 counter on Lightsteel Enforcer.

Lightwalker has flying as long as it has a +1/+1 counter on it.

Lone Hunter has indestructible as long as it has attacked alone this turn.
Whenever Lone Hunter becomes the target of a spell or ability you control, if it cost one or more mana to cast or activate, you may pay {1}. If you do, draw a card.

When Lone Stranger enters, if you control no other creatures, create two 1/1 colorless Spirit creature tokens.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Lord Jared, the Griffin Knight attacks, put a +1/+1 counter on each other attacking creature you control.

Improve {1}{W} ({1}{W}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Prevent all combat damage that would be dealt to attacking embattled creatures you control. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Whenever you gain life, Militant Youth gets +1/+1 until end of turn.

Prowess
Whenever you cast a noncreature spell, Noxan Pilgrim gains lifelink until end of turn.

Defender, first strike
{1}{G}: Oaken Spearman can attack this turn as though it didn't have defender.

Rhapsody {5}{W}{W} (Pay {5}{W}{W} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Whenever Oltenen Paradise-Seeker attacks, up to one target creature's base power and toughness each become equal to Oltenen Paradise-Seeker's power and toughness until end of turn.

Converge — When Operations Manager enters, create X 1/1 colorless Servo artifact creature tokens, where X is the number of colors of mana spent to cast Operations Manager.

{1}{W}, Exile Outcast of the Folded Fan from your graveyard: Create a 1/1 white Bird creature token with flying. Activate only as a sorcery.

Lifelink
Outskirts Provider enters with a +1/+1 counter on it if a creature attacked this turn and wasn't blocked.

{3}{W}{W}: Put a divinity counter on Paragon of Noon. It gains indestructible.
Whenever Paragon of Noon attacks, if it has a divinity counter on it, search your library for a creature card with mana value 1, put it onto the battlefield tapped and attacking, then shuffle.

First strike
When Petal of a Heart enters, if you cast it, reveal up to two permanent cards with mana value 1 from your hand. For each card revealed this way, conjure a duplicate of that card into your hand.

When Phantom Threader enters, create a white Aura enchantment token named Spectral Whispers attached to target creature. The token has enchant creature and “Enchanted creature has double strike as long as you control it. Otherwise, it can't attack or block.”

Flying
Whenever Planetary Reconnoiterer attacks, target creature you control gains flying until end of turn.

When Polgek Artisan enters, create an X/X colorless Juggernaut artifact creature token, where X is the number of artifacts and enchantments you control.

{2}{W}, Sacrifice Pompous Explorer: Destroy target artifact or enchantment.

Flying
Play with the top card of your library revealed.
Spells cost {X} more to cast, where X is the mana value of the top card of your library.

First strike
Whenever a nontoken creature you control leaves the battlefield, you may pay {W}. If you do, create a 1/1 colorless Spirit creature token.

Each player can't untap more than one nonbasic land during their untap step.

Double strike
Concord — Pristine Duelist gets +2/+1 as long as there are four or more card types among permanents you control.

Sacrifice Proud Lion: Counter target spell that targets you.
Ride {1}{W} ({1}{W}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)