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

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.

Sky Tether

Enchant creature
Enchanted creature has defender and loses flying.

Gideon's Reproach

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

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.

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.

Serra Avenger

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