The Silver Crystal, from what is shown in the movies and original series, seems to use the lifeforce of the wielder for the bigger incantations. The only two times it didn't happen, the other senshi were lending their power to Usagi. So maybe the reason the queen didn't use the crystal immediately had in part to do with that.
“We can never undo what we have done. We can never go back in time. We write history with our decisions and our actions. But we also write history with our responses to those actions. We can leave the pain and the damage in our wake, unattended, or we can do the work of acknowledging and fixing, to whatever extent possible, the harm that we have caused.”
— On Repentance and Repair: Making Amends in an Unapologetic World by Danya Ruttenberg
— On Repentance and Repair: Making Amends in an Unapologetic World by Danya Ruttenberg