msem-instigator

Vigilance
Whenever Vital Companion attacks, you may put a quest counter on an enchantment you control.

Wandering Megaflora has hexproof as long as it's untapped.
Whenever Wandering Megaflora attacks, untap another target creature you control.

Assault {G} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
Whenever a creature you control assaults, it gains indestructible until end of turn.

Flash
Once each turn, you may cast a spell without paying its mana cost. If you do, at the beginning of your next upkeep, you lose the game unless you pay that spell's mana cost.

Spells your opponents cast cost {1} more to cast.
Spells you cast cost {1} less to cast.

Flash
Creatures other than Equilibrium Paladin that entered this turn lose all abilities and have base power and toughness 1/1.

Creatures you don't control get -1/-0 as long as their controller is cursed.

Deathtouch
Artifacts and creatures your opponents control have “At the beginning of your upkeep, you lose 1 life unless you tap this permanent and have an opponent gain control of it.”

Whenever Vedlinn Ross becomes tapped, exile a nonland card from target opponent's graveyard. Copy it. You may cast the copy this turn. (You still pay its costs, including color. Copies of permanents enter as tokens.)
Whenever you cast a spell from anywhere other than your hand, copy it. You may choose new targets for the copies.

Whenever Apostle of the Spirit Moon becomes blocked by a creature, Apostle of the Spirit Moon deals 1 damage to that creature and that creature's controller.

Menace
Creatures you control with mana value 1 get +2/+0 and have menace.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
At the beginning of your end step, you may choose a cursed opponent. If you do, draw a card unless that player pays 2 life for each Curse attached to them.

When Hatewracked Explorer enters, you may sacrifice an artifact or creature. If you do, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)
{4}{B}{R}, Sacrifice an artifact or creature: Destroy target creature if it was dealt damage this turn.

Whenever a creature dies, exile it.
Hiroto Jaakuna has all activated abilities of creature cards exiled with Hiroto Jaakuna.

Foretell {B}{R} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Haste
Whenever Sofia deals combat damage to an opponent, exile the top card of that player's library face down and look at it. You may play that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell. Then foretell Sofia. It costs {0} to foretell this way.

Menace
Whenever a land enters, you may search its controller's library for up to three land cards with the same name as that card, put them into that player's graveyard, then that player shuffles.

Whenever a player activates an ability that isn't a mana ability, Burning-Tree Shaman deals 1 damage to that player.

Whenever Shianne's Guardian or another creature you control enters, you may pay {1}{R}{G}. When you do, that creature deals damage equal to its power to any target.

Reach
Wanderlust — Voliv Skyhunter gets +2/+0 and has first strike as long as you control four or more differently named lands.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
You may play an additional land on each of your turns.
{1}{R}{G}: Demigod — Whenever a land you control enters this turn, it deals 3 damage to up to one target creature or planeswalker.
{6}{R}{G}: God — Until end of turn, lands you control become 3/3 Spirit creatures with indestructible and haste that are still lands. Untap them.

Vigilance
If another creature would die, exile it instead.
At the beginning of your upkeep, return each creature card exiled with Arbiter of Endless Summer to the battlefield under its owner's control.

Vigilance, reach
Identity — As long as you control at least two other creatures that share a creature type with Gallord of the Order, other creatures you control get +1/+1 and have first strike.

Identity — Phalanx's Shieldbearer has hexproof as long as you control at least two other creatures that share a creature type with it.

Vigilance, reach
Watchful Authority can block an additional creature each combat.

{T}, Sacrifice Ilhus, Knight of Zarad: Destroy all creatures.