msem-instigator

When Skeletal Shredwing enters, target creature can't block this turn.
Revive {5}{R} ({5}{R}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Vision (Whenever this or another creature you control enters, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Tracker of Wild Places envisions a creature card, you may untap a permanent you control.

Counter target spell.
Satrapycycling {2} ({2}, Discard this card: Search your library for a Satrapy card, reveal it, put it into your hand, then shuffle.)

Flying, first strike, lifelink
When Stalwart Seraph enters, untap all creatures you control.

Choose three. You may choose the same mode more than once.
• Each opponent sacrifices a creature.
• Each opponent loses 2 life and you gain 2 life.
• Choose a player and look at their hand. Choose a nonland card from among them. They discard it.

When Pensive Songwriter enters, you may copy and then exile an instant or sorcery card with mana value 2 or less from your hand. Cast the copy without paying its mana cost. You may cast the card as long as it remains exiled.

When Serafina's Gift enters, if you cast it, target opponent gains control of it.
At the beginning of your upkeep, draw three cards, then discard two cards.

You get a fuse counter, then Ignition Sequence deals X damage to any target, where X is 2 plus the number of fuse counters you have.

Flying
Herald of Oblivion enters with X -1/-1 counters on it, where X is your life total.

Whenever an enchantment you control enters or Zoulev Ritualist becomes enspirited, draw a card.

Target opponent shuffles a card from their hand into their library.

Flying, deathtouch
Whenever Yaran enters or attacks, target opponent may pay 3 life. If that player doesn't, they choose a nonland permanent they control. Tap that permanent. You gain control of it. (This effect doesn't end.)

When Solar Wisp enters, put a +1/+1 counter on target creature.

Hexproof
Discard two cards: You may cast target instant or sorcery card in your graveyard this turn. If that spell would be put into a graveyard, exile it instead.
At the beginning of your end step, if you have two or fewer cards in hand, transform Fahrib.

As Coveted Tower enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {G}, {U}, or {R}.

Flying
Synchronous Hellkite enters with a +1/+1 counter for each other artifact you control.
Sacrifice three artifacts: Return Synchronous Hellkite from your graveyard to the battlefield.

When Shackled Memories enters, return target instant or sorcery card from your graveyard or card with flashback you own from exile to your hand.
Invocation — Whenever you spend four or more mana to cast a spell or activate an ability during your turn, create a 1/1 white Spirit creature token with flying.

Hexproof
Whenever another creature you control becomes the target of a spell an opponent controls, you may submerge that creature. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)
{1}{U}{U}: Turn target face-down creature you control face up.

Haste
When Speaker of the Iris enters, abound. (To abound, you may cast a spell that costs less than this from your hand without paying its mana cost.)
Other creatures you control have haste.

Reach
Whenever you cast a spell with mana value 5 or greater, put two +1/+1 counters on Netcrawler.

Flying
When Dreadstone Watcher dies, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

(Add a quest counter as this enters. Sacrifice after 3.)
Once each turn, when you cast a spell with mana value equal to the number of lands you control, you may add a quest counter.
1, 2 — You may search your library for a basic land card, reveal it, then shuffle and put that card on top. You gain 1 life for each quest counter on Hoof Cliff Expedition.
3 — Search your library for a creature card, reveal it, put it into your hand, then shuffle.

Target creature gets +3/+3 and gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Whenever a creature dealt damage by Rei's Betrayer this turn dies, you gain life equal to that creature's toughness.

Whenever Seasoned Lookout deals combat damage to a player, it voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever Seasoned Lookout phases in, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand.