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
Whenever a Subroutine you control runs, this creature gets +1/+0 until end of turn and can't be blocked this turn.

When Coercive Contractor enters, create a Treasure token.
{X}, {T}, Sacrifice a Treasure: Gain control of target nontoken creature with mana value X until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery.

{T}, Sacrifice an artifact: Add one mana of any type.
Once each turn, when you cast an instant or sorcery spell, you may create a 1/1 colorless Construct artifact creature token.

Lands you control lose all mana abilities and have “{T}: This land deals 1 damage to any target.”
If a nonland source you control would deal damage, prevent that damage and create that many Treasure tokens.

Enchant creature
When Collector's Item enters, surveil 2.
Enchanted creature loses all abilities and is a colorless Sculpture creature with base power and toughness 0/2.

This spell costs {X} less to cast, where X is your greatest devotion to a single color.
Menace

Vigilance
{T}, Sacrifice a creature: Target creature can't be blocked this turn. Activate only if you control a black permanent.

Create a 0/0 white Army creature token if your devotion to white is three or more.
Put a +1/+1 counter on each creature you control.

If a creature you control attacking causes a triggered ability of a permanent you control to trigger, if that creature is attacking alone, that ability triggers two additional times.

When this Equipment enters, create a 1/1 white Citizen creature token, then attach this Equipment to it.
Equipped creature gets +2/+1 and has trample.
Equip {4}

Haste
Level up {2}{R}
[level 1-2] Haste
Whenever this creature attacks, it deals 2 damage to any target.
[level 3+] Haste
Whenever this creature attacks, it deals 5 damage to any target.

This spell costs {1} less to cast for each creature you control.
Create X 1/1 white Citizen creature tokens.

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.

Fabric — This spell costs {1} less to cast for each enchantment you control.
Vigilance

Corrupt — When this creature enters, if it isn't a token and you control a permanent with greater mana value than it, create a token that's a copy of this creature.
{T}: Add {G}.

Flash
When Conduit of Change enters, if you cast it, return all other nonland permanents to their owner's hands.
Spellcharge 7

Choose one —
• Target creature gets +2/+0 and gains indestructible until end of turn.
• Target player sacrifices a creature.

Congressional Hall enters tapped.
{T}: Add {W} or {U}.
{4}: Make a pledge. Activate only as a sorcery.

Flash
Approval — When Congressional Kraken enters, return each nonland permanent with mana value less than or equal to the number of colors among permanents you control to their owners' hands.

Damned — When this creature enters, mill three cards. If you've sacrificed a permanent this turn, you may return one of the milled cards to your hand.

Whenever an opponent loses life for the first time each turn, they lose 3 life.
Whenever an opponent discards a card for the first time each turn, they discard a card.
Whenever an opponent sacrifices a permanent for the first time each turn, they sacrifice a nonland permanent.

Gain control of up to two target creatures with total mana value 4 or less until end of turn. Untap one of them. It gains haste until end of turn.

Destroy target artifact or enchantment. If that permanent was a token, draw a card.

Counter target activated ability from a nonland source.
Draw a card.