Flying, vigilance
Whenever you amp it up, scry 2.

Whenever Hazakh Conscriptor deals combat damage to a player, create a 2/2 colorless Minion creature token with decayed.

When Hearty Roughrider enters or leaves the battlefield, you gain life equal to the greatest toughness among creatures you control.
Wander {4}{G}{G}

At the beginning of combat on your turn, if you have at least 3 life more than your starting life total, untap target land.

When High Senator Talpa enters, choose target opponent. If you control fewer creatures than that player, create a number of 1/1 colorless Soldier creature tokens equal to the difference. If you have fewer cards in hand than that player, draw cards equal to the difference.

Menace
Whenever Highseas Renegade deals combat damage to a player, exile the top card of their library. You may play that card until the end of your next turn, and mana of any type can be spent to cast it.

Trample
When Idealistic Voter enters, make a pledge.

Vigilance
When Indomitable Jicru enters, you gain 5 life and draw a card. If it wandered, creatures you control get +2/+2 until end of turn.
Wander {6}{G}{W}

Whenever Inner Ring's Pupil enters or attacks, target player discards a card. If they can't, they sacrifice a creature. If they can't, they lose 7 life.

Flash
Deathtouch

When Iris Cultist enters, you lose 1 life.
Cybersoul {4}{B}

Deathtouch
When this creature transforms into Iris Flayer, target player draws a card and loses 1 life.

Haste
Whenever Jens Slopeskidder or a land you control enters, put a +1/+1 counter on target creature you control.
Wander—{1}{G}, Return a land you control to its owner's hand.

Flying
Approval — When Judge, Jury, and Executioner enters, exile up to one target creature with mana value less than or equal to the number of colors among permanents you control.

Vigilance, reach, trample
Ward—Sacrifice a noncreature permanent.

{1}{W}, {T}: Tap target creature.
Spellcharge 3

At the beginning of your upkeep, remove all counters from La Bete du Harnelle, then put two different counters of your choice not removed this way from among deathtouch, reach, vigilance, trample, or hexproof on it.

Lifelink
Whenever Laboratory Mentor attacks, teach target attacking creature with lesser power lifelink.

Whenever Leonin Wildstar attacks, if its power is 4 or greater, it gains first strike until end of turn.

When Leyspark Wielder enters, if you cast it, add {G}{U}{R}. Spend this mana only to cast instant or sorcery spells.
Whenever you cast an instant or sorcery spell, target creature gets +1/+1 and gains trample and haste until end of turn.

{T}: Add {R}{R}{R}. Spend this mana only to cast creature spells. If that mana is spent on a creature spell, it enters with an additional haste counter and decayed counter on it.

When Lost Resistor dies, you gain 1 life.
Cybersoul {X}{X}{W}

Flash
When Louna, the Ever-Learning enters, for each kind of counter among permanents you control, you may put a counter of that kind on Louna, the Ever-Learning.

Flying
Lurking Gargoyle enters with your choice of counter from among deathtouch, menace or vigilance on it.

Flash
Lyceum Project enters with a +1/+1 counter and a flying counter on it.
When Lyceum Project dies, you may put its counters on target creature.