As an additional cost to cast this spell, sacrifice a creature.
Exile the top X cards of your library, where X is the sacrificed creature's power. Until the end of your next turn, you may play those cards.

Target creature gains indestructible until end of turn. Teach it lifelink.

When Meeting of the Elites enters, create a tapped Treasure token.
You've sacrificed a nonland permanent this turn.

When Mellan, Defense Attorney enters, make a pledge.
{T}: Choose a color from among other permanents you control. Another target creature you control gains hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn.

When Merciless Headsman enters, create a 2/2 colorless Minion creature token with decayed.
{1}{B}, Sacrifice another creature: Draw a card.

Trample
Creatures you control with trample have “{1}{R}{G}: This creature must be blocked each combat this turn if able.”

When Minister of Utility enters, make a pledge.
{2}, Sacrifice a Clique: Make a pledge.

Trample
Whenever Mondo attacks, create a 1/1 colorless Soldier creature token that's tapped and attacking, then Mondo gets +X/+0 until end of turn, where X is the number of attacking creatures.

Trample
Whenever you attack, up to one target attacking creature gets +2/+0 and gains trample until end of turn.

Neglected Slums enters tapped.
{T}: Add {R} or {G}.
{4}: Make a pledge. Activate only as a sorcery.

Creatures you control with counters on them have all activated abilities of other creatures you control with counters on them.
{1}, {T}: Teach target creature vigilance.

When Night Squad enters, teach target creature menace. If you put a +1/+1 counter on it this way, it can't be blocked this turn.

Whenever you gain life, put a +1/+1 counter on Nourishing Orator.
{2}{G}{W}: Nourishing Orator gains lifelink until end of turn.

All creatures get -2/-2 until end of turn. Until end of turn, whenever one of those creatures die, create a tapped Treasure token.

During your turn, you may play cards from your graveyard but not from anywhere else.
Whenever you cast an instant or sorcery spell, exile that card instead of putting it into your graveyard as it resolves.
If another permanent you control would be put into your graveyard, exile it instead.

Your maximum hand size is zero.
Pay 1 life: Draw a card. Activate only as a sorcery.

Open Air Boardwalk enters tapped.
{T}: Add {G} or {W}.
{4}: Make a pledge. Activate only as a sorcery.

Until end of turn, target creature you control gets +2/+2 and gains “Whenever this creature is dealt damage, you may have it fight target creature you don't control.” Then, it fights target creature you don't control.

When Overbearing Researcher enters, put a +1/+1 counter on target creature.
Each creature you control has ward {X}, where X is the number of counters on that creature.

Create a token that's a copy of target creature you control, except it has haste. Sacrifice it at the beginning of the next end step. If {G} was spent this spell, the token must be blocked each combat this turn if able. If {B} was spent to cast this spell, the token gains deathtouch.

Menace
At the beginning of your end step, if you've sacrificed a permanent this turn, you may discard a card. If you do, draw a card.

Choose up to one for each color among red, green, and white among permanents you control.
• Target player creates a 2/2 red Berserker creature token with haste and “This creature can't block.”
• Creatures target player controls get +2/+0 until end of turn.
• Each creature you control deals damage equal to its power to target creature.

When Penrath Ambassador enters, target creature must be blocked each combat this turn if able and target creature can't block this turn.
Basic landcycling {1}{G}

Whenever Penrath Dispatcher attacks, you may put a creature card with mana value less than or equal to Penrath Dispatcher's power from your hand onto the battlefield tapped and attacking.
{2}: Penrath Dispatcher gets +1/+1 until end of turn.