msem-instigator

Equipped creature gets +2/+2.
Equip {3}

Vigilance
Whenever Bartimus attacks, another target attacking creature gets +1/+1 until end of turn. If that creature is a Soldier, put a +1/+1 counter on it instead.

Protection from multicolored
[+2]: Create a colorless artifact token named Mind Stone with “{T}: Add {C}” and “{1}, {T}, Sacrifice Mind Stone: Draw a card.”
[–3]: Create Barxbot 9000, a 6/4 colorless legendary Construct artifact creature token with “All damage that would be dealt to Barx planeswalkers you control is dealt to this creature instead.”
[–12]: You and target opponent each gain control of each permanent the other controls that's one or more colors.

As an additional cost to cast this spell, exile a noncreature artifact you control with mana value X until Barx leaves the battlefield or fails to resolve. X can't be 0.
[+1]: Exile the top card of your library. You may play it until you exile another card with Barx.
[–3]: Create an X/X colorless Hound artifact creature token, where X is the greatest mana value among cards exiled by Barx.
[–10]: Search each player's library for any number of nonland cards with total mana value 10 or less and exile them, then those players shuffle. Cast those cards without paying their mana costs.

{4}{G}: Battle Station gets +3/+3 until end of turn.
Cycling {2/G}

Return any number of target creature cards with total mana value X or less from your graveyard to the battlefield, where X is the number of cards in your graveyard. Exile Battle at the Boneyard.

Enchant creature you control
Enchanted creature gets +3/+3.
When Belligerence enters the battlefield, enchanted creature fights target creature an opponent controls.
When enchanted creature dies, if it's a Warrior, return Belligerence to its owner's hand.

Pressure {2}{G}
As an additional cost to cast this spell, sacrifice a creature.
Search your library for a creature card with mana value X or less, where X is equal to twice the sacrificed creature's mana value, put it onto the battlefield, then shuffle.

Menagerie — This spell costs {2} less to cast if there are five or more creature types among creatures you control.
Destroy target creature with power or toughness 4 or greater.

At the beginning of your end step, mill two cards. Then if ten or more cards are in your graveyard, transform Bitter Duckling.

Equipped creature gets +1/+1 and has haste.
Whenever a creature you control enters the battlefield, if it was cast from exile, you may attach Blade of the Valiant to it.
Equip {2}

Blazing Outro deals 4 damage to any target. Then you may tap an untapped Wizard you control. If you do, cast an instant or sorcery card with mana value 4 or less from your graveyard without paying its mana cost. If it has X in its mana cost, X is 4. If that spell would be put into a graveyard, exile it instead.

Flying
Menagerie — When Bleakrealm Mini-Menace enters the battlefield, if there are five or more creature types among creatures you control, it deals 2 damage to target opponent and 2 damage to up to one target creature or planeswalker that player controls.

Bleakrealm Moor enters the battlefield tapped unless you played it from exile.
{T}: Add {B} or {R}.

Vigilance
Blessed Suncrusher's power and toughness are each equal to your life total.

Target creature gets -4/-4 until end of turn. If that creature would die this turn, exile it instead.
Cycling {2}

Whenever you discard a card or an artifact is put into your graveyard from the battlefield, put a +1/+1 counter on Bloodhollow Bruiser.
Cycling {2}

Target creature gets +1/+0 and gains first strike until end of turn.
Cycling {2}

Menace
Cycling {R}

Slipstream
Sacrifice Bonetooth Darter: Counter target instant, planeswalker, or sorcery spell unless its controller pays {1}.

You may pay {1}{B} and tap an untapped Shaman you control rather than pay this spell's mana cost.
Target player sacrifices a creature. You gain life equal to its toughness.

You may activate an additional loyalty ability of Boxue and Ma'Long during your turn if you've cast two or more spells this turn.
[+1]: Scry 2.
[–2]: Exile the top two cards of your library. You may play one of them this turn. When you do, put the other card into your hand.
[–6]: Whenever you cast a spell this turn, copy it. You may choose new targets for the copy.

{T}: Add {C}.
{1}, {T}: Add one mana of any color. When that mana is spent to cast an Adventure spell, scry 1.

Brilliant Runepearl enters the battlefield tapped.
Whenever you cast a permanent spell, you gain 1 life.
{T}: Add one mana of any color. Spend this mana only to cast permanent spells.

Defender
When Brine Duelist enters the battlefield, create a Treasure token.
{W}{U}{B}{R}{G}: Put a +1/+1 counter on Brine Duelist. It loses defender.