When Blood Fountain enters the battlefield, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.") {3}{B}, {T}, Sacrifice Blood Fountain: Return up to two target creature cards from your graveyard to your hand.

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

When Lembas enters the battlefield, scry 1, then draw a card. {2}, {T}, Sacrifice Lembas: You gain 3 life. When Lembas is put into a graveyard from the battlefield, its owner shuffles it into their library.

When Mesmeric Fiend enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card. When Mesmeric Fiend leaves the battlefield, return the exiled card to its owner's hand.

When Myr Kinsmith enters the battlefield, you may search your library for a Myr card, reveal it, put it into your hand, then shuffle.

At the beginning of your upkeep, if Myr Servitor is on the battlefield, each player returns all cards named Myr Servitor from their graveyard to the battlefield.

{1}, Sacrifice a creature: Look at the top two cards of target opponent's library, then exile one of them.

Destroy target nonlegendary creature.

As an additional cost to cast this spell, sacrifice an artifact or creature. Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Target creature gets -1/-1 until end of turn for each Swamp you control.

As an additional cost to cast this spell, sacrifice an artifact or creature. You gain life equal to the sacrificed permanent's mana value. Draw two cards.

({T}: Add {B}.)

({T}: Add {W} or {B}.) Sunlit Marsh enters the battlefield tapped.

{1}, {T}: You gain 2 life. {2}, {T}, Exile Campfire: Put all commanders you own from the command zone and from your graveyard into your hand. Then shuffle your graveyard into your library.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

{T}, Sacrifice Nihil Spellbomb: Exile target player's graveyard. When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Exile target artifact or enchantment.

Creatures your opponents control get -1/-1 until end of turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Whenever a player sacrifices a creature, you may put a +1/+1 counter on Mortician Beetle.