Echo {1}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Flying

Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Flying

{B}: Battlefly Swarm gains deathtouch until end of turn.

Flying; swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Protection from green (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything green.)

Creatures your opponents control can't have +1/+1 counters put on them.

When Blister Beetle enters the battlefield, target creature gets -1/-1 until end of turn.

When Bond Beetle enters the battlefield, put a +1/+1 counter on target creature.

When Brain Maggot enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card until Brain Maggot leaves the battlefield.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Sacrifice Brain Weevil: Target player discards two cards. Activate only as a sorcery.

Flying

Brass Gnat doesn't untap during your untap step.

At the beginning of your upkeep, you may pay {1}. If you do, untap Brass Gnat.

When Brood of Cockroaches is put into your graveyard from the battlefield, at the beginning of the next end step, you lose 1 life and return Brood of Cockroaches to your hand.

Whenever Broodhatch Nantuko is dealt damage, you may create that many 1/1 green Insect creature tokens.

Morph {2}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

{2}{B}, {T}: Exile up to three target cards from a single graveyard.

{1}{G}, Sacrifice Caustic Caterpillar: Destroy target artifact or enchantment.

Flying

Whenever Caustic Wasps deals combat damage to a player, you may destroy target artifact that player controls.

Whenever Chainflail Centipede or equipped creature attacks, it gets +2/+0 until end of turn.

Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

When Circuit Mender enters the battlefield, you gain 2 life.

When Circuit Mender leaves the battlefield, draw a card.

Clockwork Beetle enters the battlefield with two +1/+1 counters on it.

Whenever Clockwork Beetle attacks or blocks, remove a +1/+1 counter from it at end of combat.

Vanishing 3 (This creature enters the battlefield 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.)

When Deadly Grub dies, if it had no time counters on it, create a 6/1 green Insect creature token with shroud. (It can't be the target of spells or abilities.)

Flying

Sacrifice a creature: Devouring Swarm gets +1/+1 until end of turn.

Sacrifice a creature: Dross Hopper gains flying until end of turn.

Scavenge {5}{G} ({5}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

{4}{B}: Return Durable Coilbug from your graveyard to your hand.

When Duskshell Crawler enters the battlefield, put a +1/+1 counter on target creature.

Each creature you control with a +1/+1 counter on it has trample.

Ebony Fly enters the battlefield tapped.

{T}: Add {C}.

{4}: Roll a d6. Until end of turn, you may have Ebony Fly become an X/X Insect artifact creature with flying, where X is the result.

Whenever Ebony Fly attacks, another target attacking creature gains flying until end of turn.

Flying

{G}{G}: Emerald Dragonfly gains first strike until end of turn.

When Endless Cockroaches dies, return it to its owner's hand.

Ferropede can't be blocked.

Whenever Ferropede deals combat damage to a player, you may remove a counter from target permanent.

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Flow of Maggots can't be blocked by non-Wall creatures.

Flying

{B}: Regenerate Fog of Gnats.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

Fretwork Colony can't block.

At the beginning of your upkeep, put a +1/+1 counter on Fretwork Colony and you lose 1 life.

{G}, Sacrifice Giant Caterpillar: Create a 1/1 green Insect creature token with flying named Butterfly at the beginning of the next end step.

{1}, Sacrifice Grave-Shell Scarab: Draw a card.

Dredge 1 (If you would draw a card, you may mill a card instead. If you do, return this card from your graveyard to your hand.)

As long as Grist, the Hunger Tide isn't on the battlefield, it's a 1/1 Insect creature in addition to its other types.

+1: Create a 1/1 black and green Insect creature token, then mill a card. If an Insect card was milled this way, put a loyalty counter on Grist and repeat this process.

-2: You may sacrifice a creature. When you do, destroy target creature or planeswalker.

-5: Each opponent loses life equal to the number of creature cards in your graveyard.

{2}, Exile Halo Scarab from your graveyard: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

{X}{B/P}: Remove up to X counters from target permanent. For each counter removed this way, Hex Parasite gets +1/+0 until end of turn. ({B/P} can be paid with either {B} or 2 life.)

When Ironshell Beetle enters the battlefield, put a +1/+1 counter on target creature.

{T}: Choose target permanent you control or suspended card you own. If that permanent or card has a time counter on it, you may remove a time counter from it or put another time counter on it.

{2}: Regenerate target artifact creature.

Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life.

Reach

Undergrowth -- When Kraul Harpooner enters the battlefield, choose up to one target creature with flying you don't control. Kraul Harpooner gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard, then you may have Kraul Harpooner fight that creature.

{5}{G}: Kraul Warrior gets +3/+3 until end of turn.

When Loam Larva enters the battlefield, you may search your library for a basic land card, reveal it, then shuffle and put that card on top.

Whenever a creature you control dies, put a loyalty counter on Lolth, Spider Queen.

0: You draw a card and you lose 1 life.

-3: Create two 2/1 black Spider creature tokens with menace and reach.

-8: You get an emblem with "Whenever an opponent is dealt combat damage by one or more creatures you control, if that player lost less than 8 life this turn, they lose life equal to the difference."

When Marker Beetles dies, target creature gets +1/+1 until end of turn.

{2}, Sacrifice Marker Beetles: Draw a card.

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

{G}, {T}, Sacrifice Nantuko Calmer: Destroy target enchantment.

Threshold -- Nantuko Calmer gets +1/+1 as long as seven or more cards are in your graveyard.

Sacrifice a creature: Nantuko Husk gets +2/+2 until end of turn.

{B}: Nantuko Shade gets +1/+1 until end of turn.

When Nantuko Tracer enters the battlefield, you may put target card from a graveyard on the bottom of its owner's library.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

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

At the beginning of combat on your turn, if you control another creature with power 4 or greater, put a +1/+1 counter on Nessian Hornbeetle.

Flying

{B}: Phyrexian Battleflies gets +1/+0 until end of turn. Activate no more than twice each turn.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Whenever Plague Fiend deals combat damage to a creature, destroy that creature unless its controller pays {2}.

Flying

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

At the beginning of your upkeep, if you control five or more lands, put four +1/+1 counters on Scute Mob.

{B}: Skittering Heartstopper gains deathtouch until end of turn.

Flash

This spell can't be countered.

Reach, protection from blue

Flying

Stirge can't block.

Blood Drain -- {1}{B}, Pay 1 life, Sacrifice Stirge: Draw a card.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

Flying

Whenever Swamp Mosquito attacks and isn't blocked, defending player gets a poison counter. (A player with ten or more poison counters loses the game.)

Red spells and white spells you cast cost {1} less to cast.

{1}{G}, Sacrifice Twigwalker: Two target creatures each get +2/+2 until end of turn.

Flying

{G}: Unyaro Bees gets +1/+1 until end of turn.

{3}{G}, Sacrifice Unyaro Bees: It deals 2 damage to any target.

When Virus Beetle enters the battlefield, each opponent discards a card.

Flying

Whenever you cast a Bolas planeswalker spell, you may sacrifice Wasp of the Bitter End. If you do, destroy target creature.

Return an Elf you control to its owner's hand: Untap target creature. Activate only once each turn.

Flying

Whenever Xantid Swarm attacks, defending player can't cast spells this turn.