Is polymorph expensive

The cost of polymorph, a spell in Dungeons & Dragons, can vary depending on the context of gameplay and campaign. Generally, it's considered a high-level spell, available to powerful spellcasters, which can make it valuable in terms of strategic options and gameplay impact. However, as a spell, it doesn't have a direct monetary cost beyond what is associated with spellcasting resources and character progression. Ultimately, its "expense" is more about the opportunity cost of using a high-level spell slot rather than a financial expenditure.