Celestial Unleash (天界放 ; tenkaihou) is a keyword introduced in BS49, possessed only by Avatars of Amahara Grandwalkers. This Unleash is characterized by targeting Grandwalker Nexuses of two different colors, and getting additional effects for having symbols of the complementary color, making it a combination of Unleash and Rush. The keyword's text reads:
- Celestial Unleash: X (Timing) You can put X cores from your [Color 1]/[Color 2] Grandwalker Nexus(es) to this Spirit. When you've done so, [Effect]. Also, if you control a [Color 2] symbol, [effect].
As Celestial Unleash uses the "when you've done so" wording, it is possible to move cores from the Grandwalker Nexus even if the latter effect cannot be activated, and it is also possible to move fewer cores than the effect requires (only in case the Grandwalker Nexus doesn't have any. A player using Celestial Unleash: 2 can't deliberately only move a single core if their Grandwalker has more than two, but if it only has one core, they can move one), but the secondary effect does not activate in such cases.