Gate Hound

Creatures you control have vigilance as long as Gate Hound is enchanted.

Daru Spiritualist

Whenever a Cleric creature you control becomes the target of a spell or ability, it gets +0/+2 until end of turn.

Pacifism

Enchant creature
Enchanted creature can't attack or block.

Plains

Slagwurm Armor

Equipped creature gets +0/+6.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

Battlefield Medic

{T}: Prevent the next X damage that would be dealt to target creature this turn, where X is the number of Clerics on the battlefield.

Parapet

You may cast Parapet as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Creatures you control get +0/+1.

Samite Healer

{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Sanctum Custodian

{T}: Prevent the next 2 damage that would be dealt to any target this turn.