Bastion has three states; dormant, awakened, and ascended. Bastion is typically acquired when it is dormant and each additional state can be achieved through various means; be they physical acts, emotional acts, or philosophical acts, it need only be a heroic act to awaken the next state for Bastion.

Dormant:

• Bastion is a +1 Shield.
• While a creature is attuned to Bastion, it knows the Protection fighting style if it doesn't already know it.
• When an ally within five feet of a creature attuned to Bastion is subjected to an Area of Effect spell, the creature attuned to Bastion can use their reaction to impose themselves in between the ally and the source of the AoE effect. When this is done the ally auto succeeds the saving throw and takes no damage and the creature attuned to Bastion auto fails the saving throw.

Awakened

• Bastion becomes a +2 Shield.
• When a creature is attuned to Bastion, it's Paladin Channel Divinity: Turn The Unholy ability gains the ability to affect Fey creatures.
• When an ally is reduced to 0 HP, the creature attuned to Bastion can use its reaction to move up to twice its movement speed towards the fallen ally, taking the most direct path possible, avoiding environmental hazards if possible but not avoiding enemies.
• Unconscious allies within 10 ft. gain advantage on death saving throws and treat a 19 as a 20. This radius increases to 30 ft. when the creatures paladin aura increases.

Ascended

• Bastion becomes a +3 Shield.
• When a creature is attuned to Bastion, it's Paladin Channel Divinity: Turn The Unholy ability gains the ability to affect Abberation creatures.
• When a creature is attuned to Bastion, it can chose to modify its Channel Divinity: Sacred Weapon to instead affect Bastion. When this is done, the creature gains a bonus to its AC equal to its Charisma Modifier, sheds bright light for 20 ft. and dim light for an additional 20 ft., and any ability checks made utilizing its shield (Shield Master bonus action shove, for example) gain a bonus equal to the creatures Charisma Modifier.
• Allies within 10 ft. of the creature attuned to Bastion can't fail death saving throws by rolling. This radius increases to 30 ft. when the creatures paladin aura increases.

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.

Notes: requires attunement by a Oath of Devotion Paladin