Giant Spider

Reach (This creature can block creatures with flying.)

Tangle Spider

Flash (You may cast this spell any time you could cast an instant.)
Reach (This creature can block creatures with flying.)

Canopy Spider

Reach (This creature can block creatures with flying.)

Giant Spider

Reach (This creature can block creatures with flying.)

Canopy Spider

Reach (This creature can block creatures with flying.)

Thornweald Archer

Reach (This creature can block creatures with flying.)
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Aether Membrane

Defender; reach (This creature can block creatures with flying.)
Whenever Aether Membrane blocks a creature, return that creature to its owner’s hand at end of combat.

Penumbra Spider

Reach
When Penumbra Spider dies, create a 2/4 black Spider creature token with reach.

Frostweb Spider

Reach (This creature can block creatures with flying.)
Whenever Frostweb Spider blocks a creature with flying, put a +1/+1 counter on Frostweb Spider at end of combat.

Steam Spitter

Reach (This creature can block creatures with flying.)
: Steam Spitter gets +1/+0 until end of turn.

Silhana Starfletcher

Reach (This creature can block creatures with flying.)
As Silhana Starfletcher enters the battlefield, choose a color.
: Add one mana of the chosen color.

Goliath Spider

Reach (This creature can block creatures with flying.)

Selesnya Sagittars

Reach (This creature can block creatures with flying.)
Selesnya Sagittars can block an additional creature each combat.

Tree Monkey

Reach (This creature can block creatures with flying.)

Giant Spider

Reach (This creature can block creatures with flying.)

Silklash Spider

Reach
: Silklash Spider deals X damage to each creature with flying.

Traproot Kami

Defender; reach (This creature can block creatures with flying.)
Traproot Kami’s toughness is equal to the number of Forests on the battlefield.

Orbweaver Kumo

Reach (This creature can block creatures with flying.)
Whenever you cast a Spirit or Arcane spell, Orbweaver Kumo gains forestwalk until end of turn. (It can’t be blocked as long as defending player controls a Forest.)

Venerable Kumo

Reach (This creature can block creatures with flying.)
Soulshift 4 (When this creature dies, you may return target Spirit card with converted mana cost 4 or less from your graveyard to your hand.)

Arachnoid

Reach (This creature can block creatures with flying.)

Tangle Spider

Flash (You may cast this spell any time you could cast an instant.)
Reach (This creature can block creatures with flying.)

Tel-Jilad Archers

Protection from artifacts; reach (This creature can block creatures with flying.)

Canopy Spider

Reach (This creature can block creatures with flying.)

Giant Spider

Reach (This creature can block creatures with flying.)