Let's say I've got a creature who has a shield in one hand and their focus in another. They also have the war caster feat
They'd like to cast a spell requiring a Material component with cost/that will be consumed and a somatic component.
What does the caster need to do in order to successfully cast this spell?
The way I've always understood if its a spell that needs a costly material/material consumed then you would have to drop something in order to give you a free hand to access the materials.
To give more clarity for this issue, here is a specific example. I have a high level wizard at my table, who has taken the war caster feat, they also have proficiency with shields. In one hand they wield a shield, in the other they carry their arcane focus of a wand. They cast the 6th level spell, Circle of Death which has the following Components: V, S, M (the powder of a crushed black pearl worth at least 500 gp). At the table I allowed the cast to go through as the wizard had previously obtained the crushed black pearl dust of the appropriate value. My question becomes, should I have required the wizard to drop/unequipped the shield so that he could of accessed the pearl dust from his backpack/component pouch.