Refactor: make common effect for "[player] exiles [...] they control"

https://scryfall.com/search?q=o%3A%2Fexiles+.*+they+control%2F+-%22living+death%22+-%22living+end%22+-%22scrap+mastery%22&unique=cards&as=grid&order=name

Nicol Bolas, Dragon-God & Descent Into Madness are a different effect with the choice to exile a card from hand, but all 5 others are similar enough to deserve a common effect.

Start with the linked Scryfall search and identify the five matching cards, excluding Nicol Bolas, Dragon-God and Descent Into Madness. Compare their implementations to find the repeated exile effect, then consolidate it into a common effect and verify that the five cards retain their intended behavior.

Written by the indexing model from the issue text.