lotr mtg commander deck lists Gandalf the White DOUBLE TRIGGERS Magic Custom – CommanderComplete The Best Commander Cards From

In other words, Bladecoil Serpent is basically a Syphon Mind

If you want to attach auras to a player, you can include curses like Curse of Exhaustion or Curse of Silence in the deck

The idea is to ramp it out quickly (with exclusively land-based ramp to maximize its enters trigger), then flicker it to keep the board clear

If you have loads of draw or token generation then you can have this represent a one shot kill pretty well

Flashback spells also play well with cards like Artist's Talent and Inti, Seneschal of the Sun that make you discard cards since you only go down half a card instead of a full one

Not a bad mechanic at all, just a little boring to get an evergreen as Loreholds signature mechanic