Beacon of Immortality is part of the rare beacon cycle of powerful instants that get shuffled back into your deck upon resolution
Vibe: A little bit Frankenstein but also a healthy dose of eerie pagan stuff the Chancers could very reasonably be called a cult, embracing signifiers like discarded antlers as marks of their territory
If someone is selling you a Shadowless French Base Set card, something is off
It also includes Mother Knows Best, getting players used to the idea that they can bring back banished characters
The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
When that creature dies, its owner loses the game