Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

When Acidic Slime enters the battlefield, destroy target artifact, enchantment, or land.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Trample, ward {2}

Ancient Imperiosaur enters the battlefield with two +1/+1 counters on it for each creature that convoked it.

Reach

Tap an untapped Spider you control: Search your graveyard and/or library for a card named Arachnus Web and put it onto the battlefield attached to target creature. If you search your library this way, shuffle.

Enchant creature

Enchanted creature can't attack or block, and its activated abilities can't be activated.

At the beginning of the end step, if enchanted creature's power is 4 or greater, destroy Arachnus Web.

Reach

Whenever an opponent casts an instant or sorcery spell, create a 1/2 green Spider creature token with reach.

You gain 1 life for each land you control.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Morbid -- You may put that card onto the battlefield instead of putting it into your hand if a creature died this turn.

{1}, {T}, Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

Enchant creature

Enchanted creature gets +3/+3.

As long as enchanted creature is a Human, it has trample.

Prevent all combat damage that would be dealt this turn.

({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}.)

({T}: Add {G}.)

({T}: Add {G}.)

Choose target creature you control. Whenever that creature deals combat damage to a player or planeswalker this turn, draw that many cards.

Whenever Kessig Cagebreakers attacks, create a 2/2 green Wolf creature token that's tapped and attacking for each creature card in your graveyard.

{T}: Add {G}.

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."

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")

Deathtouch

Whenever Mirkwood Spider attacks, target legendary creature you control gains deathtouch until end of turn.

Creatures you control get +3/+3 and gain trample until end of turn.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

If one or more tokens would be created under your control, those tokens plus an additional Food token are created instead. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")

Sacrifice three Foods: Draw a card.

Reach (This creature can block creatures with flying.)

Target creature you control deals damage equal to its power to target creature you don't control.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Deathtouch, ward {2}

Other Spiders you control have deathtouch and ward {2}.

Whenever another creature dealt damage this turn by a Spider you controlled dies, create a token that's a copy of that creature, except it's a Food artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life," and it loses all other card types.

Create a 1/2 green Spider creature token with reach for each creature card in your graveyard.

Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Untap target creature. It gets +2/+4 and gains reach until end of turn. (It can block creatures with flying.)

Reach

When Stingerfling Spider enters the battlefield, you may destroy target creature with flying.

({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}.)

({T}: Add {B}.)

Reach (This creature can block creatures with flying.)

Watcher in the Web can block an additional seven creatures each combat.