msem-instigator

{T}: Add {R} or {W}.
{T}, Sacrifice Sigil of Brutality: Add {R}{W}.

[+1]: Reveal the top card of your library. If it doesn't have the same name as a card in your graveyard or a permanent you control, put it into your hand. Otherwise, put it into your graveyard.
[–2]: Return target card from your graveyard to your hand.
[–8]: Return all other cards from your graveyard to your hand. Until end of turn, spells you cast cost {5} less to cast.

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 a creature you control, target creature gains trample until end of turn.

{T}: Add {C}.
{T}: Add {U}, {R}, or {W}. You can't spend this mana to cast a monocolored spell.

Menace (This creature can't be blocked except by two or more creatures.)

At the beginning of each end step, put a +1/+1 counter on equipped creature for each creature that died this turn.
Equip {1}

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

Return target nonland permanent you control and target nonland permanent you don't control to their owners' hands.
{2}{U}, Exile Doubt Oneself from your graveyard: Search your library for a card named Study Oneself, reveal it, put it into your hand, then shuffle.

Players can't pay alternative costs to cast spells. (Casting a spell without paying its mana cost is an alternative cost.)

Create a token that's a copy of target creature, except its power and toughness are switched. Sacrifice that token at the beginning of your next end step.

Flash
{3}, Exile this card from your graveyard: Draw a card.

Destroy target nonland permanent with mana value 3 or less. (Then exile this card. You may cast Irbek later from exile.)

Enchant land you don't control
Whenever enchanted land becomes tapped, you may draw a card.

Create an 8/8 blue Kraken creature token with hexproof.
Rerun (If you cast this from your hand, exile it as it resolves. Whenever a creature you control dies, you may cast this card from exile without paying its mana cost.)

Flash (You may cast this spell any time you could cast an instant.)
Reach (This creature can block creatures with flying.)

Menace
Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, each opponent discards a card.

Each planeswalker you control is an Okus in addition to its other types.
[–1]: Search your library for a planeswalker card or an Aura card with enchant planeswalker, reveal it, and put it into your hand, then shuffle.
The Paragon of Haberdashery can be your commander. If it is, it's all colors.

Indestructible
As long as your devotion to white is less than five, Heliod isn't a creature.
If an effect would create one or more kinds of tokens under your control, it creates an additional token of each kind.
{3}{W}: Put a +1/+1 counter on each other creature you control. Activate only as a sorcery.

Flameblade deals 4 damage to target player or planeswalker.

Exile target blocking or blocked creature. If that creature had a +1/+1 counter on it, you gain life equal to its power.

Sneaking Capuchin can't be blocked except by creatures with defender.
{U}: Counter target spell or ability that targets Sneaking Capuchin.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Attacking creatures get -3/-0 until end of turn.
3 | Thundering Wrath deals 1 damage to each of those creatures.

Return target artifact or enchantment card from your graveyard to your hand. You gain life equal to that card's mana value.

Flash
Flying
Whenever you cast a spell during an opponent's turn, create a Weapon token. When you do, you may attach it to another target creature with flying. (It's an Equipment artifact token with equip {2} and “Equipped creature gets +1/+1”.)

Enchant creature
When Double Arming enters, put a +1/+1 counter on enchanted creature.
Enchanted creature has menace.
{5}: Return Double Arming to its owner's hand.