Cheapest priced copy (Throne of Eldraine): $0.49 at Card Kingdom, near mint, their price list as of .
Archon of Absolution 
Creature — Archon · 3/2 · Uncommon · The List · #ELD-3
Flying
Protection from white (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything white.)
Creatures can't attack you or planeswalkers you control unless their controller pays {1} for each of those creatures.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 3 | Uncommon | $0.49 | $1.49 |
| The List | ELD-3 | Uncommon | $0.49 | — |
2 rulings from Wizards of the Coast
- 4 October 2019In a Two-Headed Giant game, creatures can attack your teammate and planeswalkers your teammate controls without requiring a mana payment.
- 4 October 2019Your opponents can choose not to pay to attack with a creature that attacks “if able.” If there's no other player or planeswalker to attack, that creature simply doesn't attack.