Vent Sentinel

Defender
{1}{R}, {T}: Vent Sentinel deals damage to target player or planeswalker equal to the number of creatures you control with defender.

Overgrown Battlement

Defender
{T}: Add {G} for each creature you control with defender.

Defender
Whenever Pride Guardian blocks, you gain 3 life.

Defender (This creature can't attack.)
{2}, {T}, Sacrifice a creature with defender: Draw a card.

Defender
{T}: Spear Spewer deals 1 damage to each player.

Defender
{T}: Add X mana in any combination of colors, where X is the number of creatures with defender you control.

Defender
Put a -0/-1 counter on Wall of Roots: Add {G}. Activate only once each turn.

Defender
Other creatures you control with defender get +0/+2.

Defender, flying
{W}: Wall of One Thousand Cuts can attack this turn as though it didn't have defender.

As an additional cost to cast this spell, tap four untapped creatures you control.
Draw three cards.