Yan Kai and the other two took out mid-grade spirit stones, replenishing their depleted magic power as they stood quietly in place and watched Liu Yu, waiting for his next instructions.
A talisman treasure retained ten to thirty percent of a treasure's power. Against ordinary Foundation Establishment cultivators, it could certainly crush them outright.
But against late-stage Foundation Establishment cultivators, or even the elite of the Foundation Establishment realm, it might not deliver the decisive blow.
After all, a talisman treasure was something between a talisman and a treasure. It was a consumable, and the power it could preserve was extremely limited compared to an actual treasure. Foundation Establishment cultivators could conceivably withstand it.
Top-tier and elite Foundation Establishment cultivators could unleash their full strength in an instant, employing all manner of methods to drain a talisman treasure's power until it was exhausted and could no longer achieve its intended effect.
Bai Lianhua, for instance, could have used her numerous second-tier talismans to wear away and dissipate the Vajra Halberd Talisman Treasure's power if Liu Yu had deployed it right at the start.
In that case, it would not have achieved its intended effect.
Moreover, talisman treasures easily cost over ten thousand spirit stones, and few Golden Core cultivators were willing to damage their treasures to make them. Very few entered circulation, so they were destined never to be a routine method, only a trump card for delivering a critical blow.
Liu Yu had held off on using it at the outset precisely because he had considered how Bai Lianhua, as a talisman maker, could unleash numerous talismans in an instant to neutralize its power.
Instead, he had waited until she had nearly exhausted her talismans before using it at the final moment, allowing it to play a decisive role.