This spell costs {1} less to cast for each counter among permanents you control.
Ward {2}

Enchant nonland permanent
Whenever a nonland permanent you control enters, if its mana value is greater than enchanted permanent's, exile enchanted permanent.

Defender
Approval — Political Prisoner can attack as though it didn't have defender as long as the number of colors among permanents you control is greater than the number of colors among permanents defending player controls.

Until end of turn, target creature gains “When this creature dies, return it to the battlefield tapped under its owner's control and teach it flying.”

Reveal the top five cards of your library. You may put a colorless permanent card, a monocolored permanent card, and/or a multicolored permanent card from among them into your hand. Put the rest on the bottom of your library in any order.

Approval — When Prismatic Propagandist enters, create X 1/1 colorless Soldier creature tokens, where X is the number of colors among permanents you control.

Vigilance
Creatures you control with vigilance have “{W}{U}, {T}: Draw a card. Activate this ability only if this creature attacked this turn.”

Whenever you cast a spell, if mana from an artifact source was spent to cast it, you may pay 1 life. If you do, draw a card. Do this only once each turn.

Whenever you cast a spell, you may pay {X}, where X is that spell's mana value. If you do, copy it. You may choose new targets for the copy. Do this only once each turn.

When Projects Overseer enters, surveil 2.

Trample, haste

Whenever you gain life, you may create a 0/0 colorless Robot artifact creature token with X +1/+1 counters on it, where X is the amount of life you gained. Do this only once each turn.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.
You choose which creatures block this turn and how those creatures block.

Exchange control of target spell or creature you control and target spell or creature an opponent controls. Controllers of spells exchanged this way may choose new targets for them.

Target creature you control deals damage equal to its power to target creature you don't control. If the creature you control has trample, excess damage is dealt to that creature's controller instead.

Each player sacrifices a creature.
As long as a creature card or creature token was put into your graveyard from anywhere this turn, Rank and Defile has flashback {2}{B}.

Target creature gets +3/+2 until end of turn. Teach it trample.

When Reconnaissance Agent enters, you may choose one —
• Exile target card from your graveyard.
• Exile another target creature.
When Reconnaissance Agent leaves the battlefield, return the exiled card to its owner's hand.

{T}, Sacrifice Redeveloped Cityscape, Exile a card from your hand: Search your library for two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Replicated Regiment enters with a +1/+1 counter and a vigilance counter on it.
At the beginning of your upkeep, you may move a counter from Replicated Regiment onto another creature.

When Research Grant enters, look at the top three cards of your library. Put one into your hand and the rest into your graveyard.
You've cast two or more spells this turn.
You've drawn two or more cards this turn.

When Resourceful Hireling enters, choose one —
• Create a 0/0 colorless Robot artifact creature token with a +1/+1 counter on it.
• Create a Treasure token.

This spell has lifelink as long as you control a creature with lifelink.
Retaliatory Outburst deals 4 damage to target tapped creature.

Trample
Whenever Revolutionary Throng attacks, if you control another creature with power 4 or greater, it gets +2/+0 until end of turn.

Approval — This spell costs {X} less to cast, where X is the number of colors among permanents you control.
Exile target creature.