Draw three cards. Discard three cards at the beginning of the next end step.

Trample
Sewer Orgg can't attack or block unless you pay {3} or sacrifice a nonland permanent.

Shock deals 2 damage to any target.

This spell costs {3} less to cast if you've cast another spell that targeted a creature this turn.
Target creature you control deals damage equal to its power to target creature or planeswalker.

Destroy target artifact. Smash to Smithereens deals 3 damage to that artifact's controller.

Trample, haste
When Steam-Powered Steer enters, it deals damage to any target equal to the amount of mana from artifacts spent to cast it.

Superweapon Blast deals 7 damage to target creature. Destroy all Equipment attached to that creature.

When Torch Twirler enters, you may discard a card. If you do, add the top two cards of your library to your evil plan.

Menace

When Zap Toady enters, create a Gold token for each creature you control named Zap Toady.

Whenever you cast a spell that targets Agent 107, draw a card.
Whenever Agent 107 attacks, if you've cast three or more spells that targeted him this turn, return up to three target cards from your graveyard to your hand.

When Apparatus Operator enters, create a reach Gadget, then attach it to Apparatus Operator.

Whenever you surveil, target creature gets +1/+1 until end of turn.

Awoken Ravager enters with a +1/+1 counter on it for each mana spent to cast it.
Endgame
When Awoken Ravager dies, if you're in your endgame, create a number of 1/1 black Nightmare creature tokens equal to its power.

Endgame
{G}, Sacrifice Bankbuster Heavy: Destroy target noncreature permanent. Activate only if you're in your endgame.

This spell costs {1} less to cast if you've cast another spell that targeted a creature this turn.
Target creature you control gets +4/+4 until end of turn.

When Citypulse Tracker enters, surveil 2. When you do, you may return a land card from your graveyard to your hand.

Reach
When Cityweb Sentinel enters, surveil 3.

When Codename: Heavy Hitter enters, create four trample Gadgets, then attach them to Codename: Heavy Hitter.
Creatures you control get +1/+1 for each permanent attached to them.

Cohort Battlemage gets +1/+0 and has trample as long as you control another creature named Cohort Battlemage.

When Elvish Witness enters, surveil 2.
{T}: Add one mana of any color.

Slivers you control have “At the beginning of each upkeep, create a 1/1 green Nightmare Sliver creature token.”

Endgame
{T}: Add one mana of any color.
{W}{U}{B}{R}{G}: Draw two cards. Put two +1/+1 counters on Escaped Subject. Activate only as a sorcery and only if you're in your endgame.

When Field Worker enters, choose one —
• Surveil 2.
• Return target Aura card from your graveyard to your hand.

When Fight Scene enters, target creature you control fights up to one target creature.
Whenever you cast a spell that targets a creature you control, you may return Fight Scene to its owner's hand.