Indulgence
Whenever you indulge, you may untap target permanent you control.

When Wandering Hedge-Mage enters, you may return target instant or sorcery card from your graveyard to your hand. If it had mana value 4 or greater, create a Treasure token.

{2}, {T}: Scry 1.

Approval — When Warrant-Borne Cop enters, target player reveals X cards from their hand, where X is the number of colors among permanents you control. You choose one of them. That player discards that card.

{T}: Add {C}.
Whenever Wasted Watchpost deals combat damage to a player, you may sacrifice it. When you do, destroy target nonbasic land that player controls.
Spellcharge 3

Once each turn, when you cast an instant or sorcery spell, you may create a 1/0 blue Elemental creature token.
Elementals you control get +1/+1.
{2}{U}, Sacrifice an Elemental: Tap up to one target creature. Scry 1.

Artifact spells you cast cost {1} less to cast.
Whenever Waveform Harnessing Unit or another artifact you control enters, target creature gets +1/+1 and gains lifelink until end of turn.

Lifelink
When Weathered Blackguard enters, you may attach target Equipment you control to it.
Wander {2}{B}

Flying
When Whipwing Dragonfly enters, you gain 2 life.

Whenever a creature entering the battlefield under your control causes an ability of a permanent you control to trigger, draw a card. This ability triggers only once each turn.

Flying, vigilance
{W}, {T}: Tap target creature.

Trample
Whenever you amp it up, double Xeon, BPM Savant's power until end of turn.

Flying
Whenever you draw your second card each turn, tap target nonland permanent.

Ward—Pay 2 life.
Whenever Zygos attacks, bless target legendary creature you control.

Aethersteel Pouncer enters with a haste counter on it.

Flash
When Agent of Deception enters, counter target creature or planeswalker spell unless its controller pays {X}, where X is your devotion to blue.

At the beginning of each opponent's upkeep, that player may pay life equal to the number of pain counters they have plus 1. If they don't, look at their hand, choose a card from it, and exile that card. If they do, that player gets a pain counter.
You may cast cards exiled with Alehana, and mana of any type can be spent to cast them.

When Alluring Queenpin enters, create a 3/3 green Elemental Spirit creature token.
Elementals you control get +1/+1.

Menace
Whenever Aphonai's Reveler attacks, defending player mills two cards. Then if that player has eight or more cards in their graveyard, Aphonai's Reveler gets +2/+1 and gains lifelink until end of turn.

When Arduous Miners enters, you may have all players discard a card.
Whenever one or more cards leave your graveyard, create a tapped Treasure token.

Haste
Arid Outrider gets +1/+0 as long as you control a token.

Whenever Ascended Seer attacks, it gets +1/+0 until end of turn unless defending player pays {1}.

When Askir's Rearguard enters, if a creature you control dealt combat damage to a player this turn, draw a card.
Wander {1}{U}

Trample
Whenever Aspiring Anarchist attacks, you may have its base power and toughness become equal to the power and toughness of another target attacking creature until end of turn.

When Ballot Registrar enters, make a pledge.
Activated abilities of nonland permanents you control cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.