Urza's Armor

If a source would deal damage to you, prevent 1 of that damage.

Ardent Militia

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

Whenever Seasoned Marshal attacks, you may tap target creature.

{1}: The next time a blue source of your choice would deal damage to you this turn, prevent that damage.

Enchant creature
Enchanted creature can't attack or block.

Rain of Blades deals 1 damage to each attacking creature.

{1}: The next time a green source of your choice would deal damage to you this turn, prevent that damage.

{1}: The next time a red source of your choice would deal damage to you this turn, prevent that damage.

First strike (This creature deals combat damage before creatures without first strike.)

Whenever an opponent taps a Mountain for mana, you may gain 1 life.

{W}{W}: Target attacking creature gets -1/-0 until end of turn.

Whenever a player casts a white spell, you may pay {1}. If you do, you gain 1 life.

Whenever a player casts a red spell, you may pay {1}. If you do, you gain 1 life.

Elfhame Palace enters tapped.
{T}: Add {G} or {W}.