msem-instigator

Flash
Ocean's Edge Kraken enters the battlefield with a hexproof counter on it.
{6}{U}{U}, Remove a hexproof counter from Ocean's Edge Kraken: Return all other creatures to their owners' hands.

{3}{U}, Exile a card from your graveyard: Omen Serpent can't be blocked this turn.

Ominous Lair enters the battlefield tapped unless you have 15 or less life.
{T}: Add {W} or {B}.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell or activate an ability of a creature.
{5}{W}{U}{B}{R}{G}, Sacrifice Osk, the Maker's Pet: Create Osk Awakened, a legendary 20/20 green Squirrel God creature token with hexproof, trample, and indestructible.

Target player reveals their hand. You choose a nonland card from it. That player discards that card unless they discard three other cards.

Enchant creature
Prevent all damage that would be dealt by enchanted creature.

Equipped creature gets +2/+0 and has first strike.
Equip Cleric or Knight {1}
Equip {3}

Return target creature card from your graveyard to the battlefield. That creature is a black Elemental in addition to its other colors and types. Upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Lifelink

Patient Optimizer gets +4/+4 as long as it has four or more kinds of counters on it.
Whenever you draw your second card each turn, upgrade Patient Optimizer. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Hexproof
• Prowess

Untap target creature and upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Hexproof

Enchant creature
You choose whether enchanted creature attacks each combat rather than its controller (after its controller chooses which of their other creatures attack. That player still chooses the player or planeswalker it attacks.)

If one or more +1/+1 counters or quest counters would be put on a permanent you control, that many plus one of those counters are put on it instead.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever a creature enters the battlefield under your control, add a quest counter.
1, 2, 3 — Create a Treasure token.
Creatures you control get +2/+2 and gain trample and haste until end of turn.
​

Reveal the top card of your library and put that card into your hand. If it's a permanent card with mana value X or less, instead you may put it onto the battlefield. If you do and fewer than seven permanents have been put onto the battlefield this way, repeat this process. X can't be 0.

Search your library for a nonland card, reveal it, and put it into your hand, then shuffle. Until the end of your next turn, spells you cast with the same name as that card cost {3} less to cast.

Look at the top six cards of your library. Put one of them into your hand and the rest into your graveyard.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Tap target creature an opponent controls.
3 — Create two 1/1 white Spirit creature tokens with flying.
​

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Create a Treasure token.
3 — Create a tapped and attacking 5/5 red Dragon creature token with flying. Exile it at the beginning of the next end step.
​

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Mill two cards.
3 — Return up to two target creature cards from your graveyard to your hand.
​

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Untap target creature or land you control.
3 — Create two 2/2 green Wolf creature tokens.
​

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Scry 1.
3 — Draw two cards.
​

Equipped creature gets +2/+3 and has reach.
Equip Scout or Archer {1}
Equip {3}

Ravenous Grue enters the battlefield with a menace counter on it.
{5}{B}{B}, Remove a menace counter from Ravenous Grue: Destroy target creature.

As an additional cost to cast this spell, pay {2} or sacrifice a creature.
Menace

Whenever another creature you control is dealt damage, put a +1/+1 counter on it. If you do, upgrade Renowned Healer. (Give it one of the listed counters it doesn't already have. The damaged creature must survive to get the counter.)
• +1/+1
• Flying
• Lifelink