When the Revival Catalyst is enabled, all characters will gain a charge. Just like before, spending a charge on one character doesn't influence charges on additional characters.
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Revival Catalyst Will Be Enabled for Dragonflight Season 2 on June 13 (NA) / June 14 (EU)
On Blizzard's Dragonflight Season 2 Update Blue Post, they have stated that the Revival Catalyst will be enabled on the week of June 13th (NA) / 14th (EU), as well as some additional information:
