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.

Axebane Guardian

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

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

Defender
Whenever Pride Guardian blocks, you gain 3 life.

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

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

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

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

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

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