Lifelink means that whenever a creature with the lifelink keyword ability deals damage, you gain life equal to the amount of damage you dealt
This card is backbreaking and can propel you immeasurably ahead of your opponents
My current edge cards are Yahenni, Undying Partisan (just kinda falls short of the other 2 tbh), Mikaeus, the Unhallowed + Skithiryx, the Blight Dragon (they generally cause a lot of hate to be directed towards me even tho I love skippy to death), Torment of Hailfire (just a stale way to win due to how common of a wincon it is for black), Praetor's Grasp (it's fun and stayed in since I cracked a foil back in the day, but it's hard to use on spelltable and ppl generally just don't like u taking things
And I think it's not even close
Ragavan is also Magic's best 1-mana commander and is always in the top 10 most-played red creatures in the format
Another downside is that as a frail 2/2 Legendary Creature, it can be easily killed off plus you cant have more than 1 on the Battlefield