Noncreature spells you cast cost {1} less to cast.

Whenever a Subroutine you control enters, you may pay {2}. If you do, it runs.
Whenever a Subroutine you control runs, this creature gets +1/+1 until end of turn.

Ward {2}
At the beginning of your upkeep, put a +1/+1 counter on Decavolt Reactor.

Double strike
Whenever Urban Twinmotors deals combat damage to a player, untap up to one target permanent.

When Seafloor Scavenger enters or deals combat damage to a player, you may return target exiled card with surface you own to your hand.

Deathtouch
{T}: Add {C}.
Spellcharge 3

When Vision Herald enters, the first spell target opponent casts during their next turn costs an additional {1} and 1 life to cast.

Level up {1}{W}
[level 1-2] Creatures you control with level up have vigilance and ward {2}.
[level 3+] Creatures you control with level up have vigilance and ward {4}.

Once each turn, when you activate an ability of a creature you control, untap that creature and put a +1/+1 counter on it.

Double strike

Whenever a creature you control deals combat damage to an opponent, exile the top card of their library. Until end of turn, you may play that card, and mana of any type can be spent to cast it.
Spells you cast and don't own cost {1} less to cast.

Level up {2}{U}
[level 1-2] If an ability of a permanent you control triggers, it triggers an additional time.
[level 3+] If an ability of a permanent you control triggers, it triggers two additional times.

Whenever you spend at least five mana to cast a spell, untap Opal-Eye Runeweaver.
{T}: Untap another target permanent not named Opal-Eye Runeweaver. Activate only as a sorcery.

At the beginning of each player's upkeep, that player mills X cards, where X is the number of tapped permanents their opponents control.

When this creature enters, tap up to one target creature.
Flow — {3}{U}: Tap target creature.

When Gray Merchant of Asphodel enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way.

Deathtouch
Whenever Pharika's Harbinger deals combat damage to a player, bless target creature that player controls.

Vigilance
{T}, Sacrifice an artifact or enchantment: Add {R}{G}.

Whenever Reborn Lily attacks, surveil 3. You may put a land card you surveilled this way from your graveyard onto the battlefield tapped.

When this creature enters, create a Treasure token.
Whenever you sacrifice an artifact or enchantment, this creature gets +2/+0 and gains trample until end of turn.

Ward {1}
Whenever Kynaios, Blade-Bound or attacks, reveal the top five cards of your library. You may put an Aura card or a card with a Blessing from among them into your hand. Put the rest on the bottom of your library in any order.

When Pursuer of Divinity enters, you may search your library for a double-faced card, reveal it, put it into your hand, then shuffle.
Cybersoul {4}{W}{B}

When Codename: Spyder enters, mill three cards.
Whenever one or more cards are put into your graveyard from your library, you may return up to one of those cards to your hand. Do this only once each turn.

Vigilance
{T}: Add {C}.
{T}: Add {C}{C}. Activate only if Steadfast Gatekeepers is a creature.
Spellcharge 3

You and General Diadem have hexproof as long as you control an artifact creature.
{1}, Sacrifice another nonland, non-Knight permanent: Create a 3/3 black Cyborg Knight artifact creature token.