msem-instigator

Put four time counters on target nonland permanent. If it doesn't have vanishing, it gains vanishing. (At the beginning of your upkeep, remove a time counter from that permanent. When the last is removed, sacrifice it.)

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Risen Looter enters, if it engorged a noncreature, nonland card, draw a card, then discard a card.

Look at the top three cards of your library. Put one of them into your hand, one on top of your library, and one on the bottom of your library.
Reprise {1}{U} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

Enchant nonland permanent
Vanishing 3 (This permanent enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
You control enchanted permanent.

For each creature, its owner puts it on the top or bottom of their library.

Vanishing 4 (This creature enters with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Remove a time counter from Tideshift Elemental: You may tap or untap target creature.

Exile target creature, then return that card to the battlefield under its owners' control.

Tizzanier Tidehunter can't be blocked as long as you control another Merfolk.

Creatures you control get +0/+2 and gain hexproof until end of turn.

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Abhorrent Exhumer enters, if it engorged a creature card, you may return target creature card from your graveyard to your hand.

If a nontoken creature you don't control would die, exile it instead.
Once each turn, you may cast a card exiled with Accursed Existence.

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Bane of Sanity enters, if it engorged a creature card, target player discards two cards.

When Blade of Reolem dies, target opponent discards a card at random.

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Blood Servant enters, if it engorged a creature card, you draw a card and you lose 2 life.

Flying
{1}, Sacrifice another creature: Regenerate target Vampire.

Whenever another Zombie you control enters, you may pay {1}{B}. If you do, exile target creature card from a graveyard. You gain life equal to its toughness.

Landfall — This spell costs {1} less to cast if you had a land you control enter this turn.
Target player discards two cards.

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
Deadland Mongrel gets +1/+1 if it engorged a creature card with power 3 or greater.

Deathtouch
Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Deadland Scavenger dies, you may put the card it engorged into your hand if it's a creature or land card.

{T}, Sacrifice a creature or land: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.

Landfall — Whenever a land you control enters, target player loses 1 life and you gain 1 life.

Lifelink
Vanishing 1 (This creature enters with a time counter on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever another creature you control dies, put a time counter on Dulling Necromancer.

When Endrison Harvester enters, you may search your library for a Swamp card, reveal it, put it into your hand, then shuffle.
{1}{B}: Endrison Harvester gets +1/+1 until end of turn.

Target creature gets -3/-3 until end of turn. When that creature dies this turn, its controller loses 2 life.

You have no maximum hand size.
At the beginning of your upkeep, draw a card.
At the beginning of your end step, you lose 1 life for each card in your hand.