msem-instigator

Whenever equipped creature deals combat damage to a player, put two balance counters on Staff of Equilibrium.
Remove a balance counter from Staff of Equilibrium: Staff of Equilibrium deals 1 damage to any target.
Equip {1}

Equipped creature gets +1/+1.
At the beginning of combat on your turn, choose flying, first strike, vigilance, trample, or haste. Equipped creature gains that ability until end of turn.
Equip {2}

{1}, {T}: Untap target creature.

As Stained Reliquary enters, choose a card type.
{T}: Target player exiles a card from their graveyard of the chosen type.
{2}, Exile Stained Reliquary: Exile all graveyards. Create a tapped 1/1 white Spirit creature token with flying.

({T}: Add {G}, {W}, or {U}.)
Stalwart Dominion enters tapped.

Equipped creature gets +5/+5.
Whenever equipped creature becomes blocked, destroy all other creatures.
Equip {5}

{T}: Add {C}.
{T}, Pay 1 life: Add {G}.
{G}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {B}.
{B}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {W}.
{W}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {U}.
{U}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {R}.
{R}, {T}: Add one mana of any color.

{T}: Add {C}.
{3}, {T}: Aetherize target permanent you control. Activate only as a sorcery. (To aetherize, create a token that's a copy of it, then exile that token.)

{T}: Add {C}.
{2}, Pay 2 life: Starved Oasis becomes a 4/2 Elemental creature until end of turn. It's still a land.

{T}: Add {C}.
{3}, {T}: Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Equipped creature gets +1/+0 for each artifact you control.
Equip—Sacrifice an artifact.

Equipped creature has menace.
Sacrifice an artifact or enchantment: Equipped creature gets +2/+2 until end of turn.
Equip {1}

({T}: Add {U} or {R}.)
Steamlit Peaks enters tapped.
{1}, {T}: Add {U}{U} or {R}{R}.

Flying
Adorned — Steamquiver Condor has ward {2} as long as it's equipped and/or enchanted.

Flying
Whenever a player shuffles their library, Steamquiver Strix deals 2 damage to that player.

When Steamwork Musicians enters, creatures you control get +1/+0 until end of turn.

Flying

When Steelscribed Katana enters, you may attach it to target creature you control.
Equipped or inscribed creature gets +2/+1.
Equip {3}
Inscribe {7} ({7}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

({T}: Add {W} or {U}.)
Still Waters enters tapped unless you control two or more basic lands.

{1}, {T}, Sacrifice Stolen Strain: Target creature gains lifelink until end of tun.
{1}, {T}, Sacrifice Stolen Strain: Target creature gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Flying
Tap an artifact you control, a creature you control, and an enchantment you control: Return Stonecut Lammasu from your graveyard to your hand. Activate only as a sorcery.