After each successful cast, the magic pattern would darken visibly, and another one would light up instead.
This was the Dark Elves' casting cooldown. Only after the cooldown was over could the magic patterns could be used again.
Only by deepening their understanding of the spells could they reduce that cooldown. And some Low Tier Spells hardly had any cooldown.
This was like how humans normally needed time to cast spells but could instant-cast them after gaining a sufficient understanding of them. They could eventually even instant-cast dozens of Low Tier Spells at once.
Dark Elves inherently didn't need any time to cast their spells because they were blessed with magic patterns, allowing them to learn any spells. Some Low Tier Spells could even be cast continuously. If they had enough mana, they could even cast for half an hour without stopping, and by relying on Low Tier Spells, they could achieve what others could only do with High Tier Spells.
