Sigiled Sword of Valeron

Equipped creature gets +2/+0, has vigilance, and is a Knight in addition to its other types.
Whenever equipped creature attacks, create a 2/2 white Knight creature token with vigilance that's attacking.
Equip {3}

Plains

Serra Angel

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

Rumor Gatherer

Alliance — Whenever another creature you control enters, scry 1. If this is the second time this ability has resolved this turn, draw a card instead.

Candletrap

Enchant creature
Enchanted creature has defender.
Prevent all combat damage that would be dealt by enchanted creature.
Coven — {2}{W}, Sacrifice Candletrap: Exile enchanted creature. Activate only if you control three or more creatures with different powers.

Wanderer's Intervention

Wanderer's Intervention deals 4 damage to target attacking or blocking creature.

Divine Arrow

Divine Arrow deals 4 damage to target attacking or blocking creature.

Sky Tether

Enchant creature
Enchanted creature has defender and loses flying.

Soulmender

Gideon's Reproach

Gideon's Reproach deals 4 damage to target attacking or blocking creature.

Segovian Angel

Serra Avenger

You can't cast Serra Avenger during your first, second, or third turns of the game.
Flying, vigilance