msem-instigator

{T}: Add {C}.
{2}, {T}, Sacrifice Arcor Diamond: Draw a card.

When Arcor-Staff Adherent enters, you may remove all -1/-1 counters from target creature.

({T}: Add {W} or {B}.)
Whenever Arctic Mine becomes tapped, you lose 1 life unless you control two or more basic lands.

{T}: Add {C}{C}.
{2}: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Target creature gets -3/-0 until end of turn. That creature's controller mills six cards.

Enchant creature
When Awash in Despair enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Double strike
Engage (This creature must be blocked each combat if able.)
{1}{R}: Balanced Blade gets +1/+0 until end of turn.

When Baneblade Stalker enters, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Equipped creature gets +1/+1.
As long as equipped creature is a Soldier or Warrior, it gets an additional +1/+1.
Equip {1}

When Bearer of the Lantern enters, you gain 3 life.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

{T}: Add {G}.
{T}: Add {G}{G}. Activate only if you control an Elemental.

Trample
Whenever Belligerent's Augur or another Warrior you control deals combat damage to a player, you may pay {1}{U}. If you do, draw a card.

All creatures get -4/-4 until end of turn.

Engage (This creature must be blocked each combat if able.)
Whenever Blade of Fretport becomes blocked by a creature, Blade of Fretport deals 1 damage to that creature.

{1}{R/W}: Untap Blade of the Long Night.

Target creature gains indestructible until end of turn. Whenever that creature perseveres this turn, create a 1/1 white Nymph creature token. (A creature perseveres when it survives damage.)

{T}: Add {B} or {G}.
{B}{G}, {T}: Target creature gets +1/+1 until end of turn.

{1}{B}: Blightcaller Shaman gains deathtouch until end of turn.

Exile up to three target cards from a single graveyard. You gain 3 life.

At the beginning of your upkeep, each player sacrifices a nonbasic land.

({T}: Add {R}.)
Bloodriver enters tapped.
When Bloodriver enters, target creature you control gains haste until end of turn.

At the beginning of your first main phase, add an amount of {G} equal to Bloomhorn's power.

Target creature you control gets +2/+2 and gains hexproof until end of turn.

When Boneweary Warrior dies, you may put a -1/-1 counter on target creature.

{1}{G}: Target land you control becomes a 3/3 green Elemental creature until end of turn.
{1}{U}: Target enchantment you control becomes a 2/2 blue Nymph creature with flying until end of turn.