Cards that are "also a Cleric, Rogue, Warrior, and Wizard" aren't for purposes of typal cost-reduction effects

Observed with [[Brighthearth Banneret]] + [[Veteran Adventurer]] and [[Stonework Packbeast]]
The cost reduction is accounted for in hand, but the actual determined/paid cost is not reduced

Reproduce the interaction using Brighthearth Banneret, Veteran Adventurer, and Stonework Packbeast, then trace the code that calculates typal cost reductions and the final determined or paid cost. Done means cards that are also a Cleric, Rogue, Warrior, and Wizard receive the reduction both in hand and when their cost is determined and paid.

Written by the indexing model from the issue text.