Demised Oath

Grant [Sanctuary] to all your allies, then discard a card with the lowest Cost from your hand. If a target already has [Sanctuary], increase or decrease the Cost of that target's random hand card by 1.
[Sanctuary]: Within 15 seconds, reduce the next Reverengy DMG taken by 40%.

Deal Reverengy DMG to all your allies once with a chance to inflict [Confuse]. If the target has [Sanctuary], nullify the [Confuse] effect.

DMG: 3360% Reverengy

Unleash 3 consecutive shockwaves, each dealing Reverengy DMG to all your allies once and inflicting [Corrupt]. For each [Sanctuary] effect existing on the field, unleash an additional shockwave.

DMG: 1280% Reverengy ×2

Whenever the number of your ally units changes, select a random unit, randomly increase or decrease the Cost of their hand cards by 1, and grant them [Sanctuary]. The Cost-change effect expires after the card is used or discarded.
[Sanctuary]: Within 15 seconds, reduce the next Reverengy DMG taken by 40%.

When Demised Oath gains [Electrify], [Ignite] or [Chill] effect, summon a bone wing that deals Electro, Fire or Frost DMG once to all your allies and inflicts [Electrify], [Ignite] or [Chill]. The summoning cooldown is 3 seconds, and is counted independently for each elemental effect.