throne's steps, stairs to the throne, throne's stairs
Mnemonic
[bi-] Bigfoot is in the [4] bathroom of the [-_] house where he is building a throne out of the bathtub. In the corner are 阝 hills of 土 soil that he compresses and 比 stacks to form the 陛 steps to the throne which is the bathtub. The throne itself is a big 阝 hill of 土 soil piled in the bathtub, that the 陛 steps to the throne lead to.