Since it's an instant, you simply pass your turn, wait until your opponent's upkeep, and then cast it, which is very close to getting an extra turn (the main difference is that your opponent will get to untap)
However, like Necropotence, it was eventually pushed to such a degenerate place that fewer and fewer games were actually interesting when it was on the table
Considering how many avenues the deck contains to gain life, why not punish the opposition a bit more by adding stuff like Marauding Blight-Priest or Enduring Tenacity
The best part of my MTG Arena experience was at the beginning, when everything was new, people were still figuring out the meta, and draft chaff decks were competitive
It comes only with one use by default, but it is easily rechargeable and because the effect is triggered after Lucius reveals a Chaos Token, he can also choose not to use it if he doesn't need it or if using it wouldn't change the outcome of the test
Not only can it be used as an insurance effect against removal effects, but since the method of sending it to the graveyard is not specified, the revival effect can be activated even if you send it to the graveyard