msem-instigator

Target creature gains double strike and trample until end of turn. (Then exile this card. You may cast the creature later from exile.)

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you cast your second spell each turn, add a quest counter.
Exile the top card of your library. You may play that card until the end of your next turn.
The second spell you cast during your next turn cost {1} less to cast.
You may cast target instant or sorcery card from your graveyard this turn. When you do, copy it. You may choose new targets for the copy.

Discard your hand, then for each creature you control that dealt combat damage to a player this turn, draw a card and create a Treasure token.
{1}{R}, Tap an untapped Pirate you control, Discard Pieces of Eight: Create a 2/1 black and red Cat Pirate creature token with menace.

{T}: Pyrespike Familiar deals 1 damage to target player or planeswalker.
Menagerie — As long as there are five or more creature types among creatures you control, if a red source you control would deal damage, it deals that much damage plus 1 instead.

Haste (This creature can attack and {T} as soon as it comes under your control.)
Quick Brown Fox can't be blocked by Hounds.

Gain control of up to two target creatures until end of turn. Untap them. They gain haste until end of turn.
Menagerie — If there are five or more creature types among creatures you control, untap all creatures you control. Until end of turn, they gain “{T}: This creature fights another target creature.”

Flash
First strike (This creature deals combat damage before creatures without first strike.)

Until end of turn, target creature gains “When this creature is dealt damage, destroy it.” (Then exile this card. You may cast the creature later from exile.)

Scoundreleo enters with a +1/+1 counter on it if a creature you controlled dealt combat damage to a player this turn.

Target creature can't block this turn. (Then exile this card. You may cast the creature later from exile.)

At the beginning of combat on your turn, if you cast both a creature spell and a noncreature spell this turn, untap up to one target land you control. It becomes a 3/1 red Sand creature with haste in addition to its other types until end of turn.

(Add a quest counter as this enters. Sacrifice after 3.)
Once each turn, when you cast an instant or sorcery spell, you may add a quest counter.
Slipsand Expedition deals damage equal to the number of quest counters on it to any target.
Add {R}{R}{R}.

Whenever you cast an instant, sorcery, or Wizard spell, Slipsand Runemage deals 1 damage to any target.

You may pay {1}{R}{R} and tap an untapped Knight you control rather than pay this spell's mana cost.
Target untapped creature you don't control blocks this turn if able. Other creatures can't block this turn.

Haste
At the beginning of your end step, return Sunwatcher Aspirant to its owner's hand.

Exile the top card of your library. You may play that card until the end of your next turn.

Menagerie — When Supply Hauler enters, if there are five or more creature types among creatures you control, you may search your library for an artifact card, reveal it, put it into your hand, then shuffle.

Haste
{T}, Discard a card: Flip a coin. If you win the flip, draw two cards. Otherwise, you may pay {R}. If you do, repeat this process.

Create two 1/1 black Rat Pirate creature tokens.
Whenever two or more creatures you control deal combat damage to a player, you may pay {2} and exile Take All You Can Carry from your graveyard. If you do, create two Treasure tokens.

Triumphant Return deals 3 damage to up to one target creature. You may put an exiled creature card you own that's on an Adventure into your hand.

Target creature gets +1/+1 and gains double strike until end of turn. (That creature deals both first-strike and regular combat damage.)

Whenever you cast a Knight spell or an Adventure spell, Wimbledon's Squire gets +1/+1 until end of turn.

Choose land or nonland. Reveal cards from the top of your library until you reveal a card of the chosen kind. Put that card into your hand and the rest on the bottom of your library in a random order.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Menagerie — If there are five or more creature types among creatures you control, creatures you control get +1/+1 until end of turn.

As long as it's your turn, Otto is an Otter Soldier creature with indestructible and “This creature's power and toughness are each equal to twice the number of creatures you control.”
[+1]: Create a 2/2 green and white Otter Soldier creature token.
[–8]: Draw cards equal to the greatest power among creatures you control, then you gain life equal to the greatest toughness among creatures you control.