Protection from red
Sacrifice Burrenton Forge-Tender: Prevent all damage a red source of your choice would deal this turn.
T: Add C.
T: Add W or B. Caves of Koilos deals 1 damage to you.
Whenever City of Brass becomes tapped, it deals 1 damage to you.
T: Add one mana of any color.
((B/P) can be paid with either B or 2 life.)
Target creature gets -5/-5 until end of turn.
Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.
+1: Create a 1/1 white Soldier creature token.
+1: Target creature gets +3/+3 and gains flying until end of turn.
−8: You get an emblem with "Artifacts, creatures, enchantments, and lands you control have indestructible."
T, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle their library.
White creatures you control get +1/+1.
Target player reveals their hand. You choose a nonland card from it with converted mana cost 3 or less. That player discards that card.
Creature tokens you control get +1/+1 and have vigilance.
Isolated Chapel enters the battlefield tapped unless you control a Plains or a Swamp.
T: Add W or B.
All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay 1."
Create two 1/1 white Spirit creature tokens with flying.
Flashback 1B (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle their library.
Create two 1/1 white Soldier creature tokens.
T: Target player exiles a card from their graveyard.
1, Exile Relic of Progenitus: Exile all cards from all graveyards. Draw a card.
At the beginning of your upkeep or whenever you cast a white spell, put a charge counter on Shrine of Loyal Legions.
3, T, Sacrifice Shrine of Loyal Legions: Create a 1/1 colorless Myr artifact creature token for each charge counter on Shrine of Loyal Legions.
Whenever another creature enters the battlefield, you gain 1 life.
Create three 1/1 white Spirit creature tokens with flying.
Equipped creature gets +2/+2 and has protection from black and from green.
Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control.
When Tidehollow Sculler enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card.
When Tidehollow Sculler leaves the battlefield, return the exiled card to its owner's hand.
2WB, T: Creatures you control gain deathtouch and lifelink until end of turn.
Hideaway (This land enters the battlefield tapped. When it does, look at the top four cards of your library, exile one face down, then put the rest on the bottom of your library.)
T: Add W.
W, T: You may play the exiled card without paying its mana cost if you attacked with three or more creatures this turn.
Until end of turn, creatures you control get +1/+1 and creatures your opponents control get -1/-1.