Venerable Monk

When Venerable Monk enters, you gain 2 life.

Ballista Squad

{X}{W}, {T}: Ballista Squad deals X damage to target attacking or blocking creature.

Flying
When Angel of Mercy enters, you gain 3 life.

Prevent the next 4 damage that would be dealt to any target this turn.

Target blocking creature gets +7/+7 until end of turn.

Enchant creature
Enchanted creature can't attack or block.

Destroy target attacking creature. You gain life equal to its power.

Whenever a player casts a white spell, you may gain 1 life.

{T}: Target attacking creature gets +1/+1 until end of turn.

{T}: Crossbow Infantry deals 1 damage to target attacking or blocking creature.

Vigilance (Attacking doesn't cause this creature to tap.)

Flying, vigilance (This creature can't be blocked except by creatures with flying or reach, and attacking doesn't cause this creature to tap.)