msem-instigator

When Null Paradigm enters, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
Whenever you cast a sorcery spell, each opponent loses 1 life and you gain 1 life.

Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)
When Exiled Warband dies, draw a card.

Return up to one target creature to its owner's hand. Draw a card.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Create a 1/1 colorless Construct artifact creature token. For each other card named Competing Design in your graveyard, create a colorless Canister artifact token with “{T}, Sacrifice this artifact: Add {C}.”

Creatures you control get +1/+1 for each color among permanents you control.

Draw three cards, then you may submerge a card from your hand. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Whenever you cast a spell, Daemonspawn deals 1 damage to each cursed opponent.

Advance {4}{R} (Cast this for {4}{R} to advance it as it enters. {4}{R}: Advance this as a sorcery.)
Whenever Intruder Drone advances, exile the top card of your library. You may cast a spell exiled with Intruder Drone with mana value 3 or less without paying its mana cost.

Cast this spell only if an opponent controls a creature with power 5 or greater or you control six or more lands.
Return all nonland permanents target player controls to their owner's hand.

Tap up to three target lands. They don't untap during their controller's next untap step.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

{T}: Hotblooded Sorcerer deals 1 damage to target player or planeswalker.
Attain {3}{R} ({3}{R}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

Equipped creature gets +2/+2 and has protection from colorless and from multicolored. This effect doesn't remove Sword of Silver and Gold. (This permanent can't be targeted, dealt damage, enchanted, or equipped by anything colorless or multicolored.)
Whenever equipped creature deals combat damage to a player, you create a 2/2 colorless Spirit creature token and that player exiles the top three cards of their library.
Equip {2}

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever a +1/+1 counter is put on Sejiri Skyhunter, it gains flying until end of turn.

(As an Encounter enters, choose an opponent to protect it. You and others can attack it. When defense counters are removed, create a 0/0 Army token if you don't control one, then put that many +1/+1 counters on a Army you control.)
When A Matricide Most Foul enters or is defeated, each opponent exiles a permanent they control with the highest mana value among nonland permanents they control.

Prowess
{T}: Catalyze, then catalyze again. Activate only if Sigil Slinger's power is 5 or greater. (The next spell you cast this turn costs {2} less to cast.)

Equipped creature gets +2/+1.
Equipped creature has first strike as long as it's attacking.
Whenever a Knight or Soldier you control attacks, you may attach Chevalier's Lance to it.
Equip {3}

When Green Daywalker enters, you may destroy target artifact or enchantment.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Green Daywalker.

Prowess, haste
When Embercore Grazer enters, add {R}{R}{R}. Spend this mana only to cast instant and/or sorcery spells.

Whenever Student of Winds attacks, upgrade target attacking creature. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying

Creatures you control get +0/+2 until end of turn. Untap those creatures.

When Fateshifter's Prophet enters, you gain 2 life and scry 2.

Draw two cards.
Flashback—{2}{U}, Discard a card. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Deathtouch
When Neophyte of the Old Gods enters, rediscover a sorcery card. (Look at the top card of your library. You may reveal it and put it into your hand if it's a sorcery card. Otherwise, put it back or into your graveyard.)

Vigilance
Lijing has indestructible as long as a Fox you control entered this turn.
Whenever an opponent draws a card, draw a card unless that player has you create a 2/1 red and white Fox creature token.

When Raving Brigand enters, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
Whenever you sacrifice an Omen, target player mills three cards.