So, heres all you need to know about these features, from what they are, what they can get you, how to get them, and most importantly, whether its worth the effort
Adwal, Breaker of Chains Architects of Will Ashiok's Forerunner Atris, Oracle of Half-Truths Baleful Strix Callidus Assassin Dee Kay, Finder of the Lost Dinrova Horror Dragonlord Silumgar Ertai Resurrected Evangel of Synthesis Gisa and Geralf Gleaming Overseer Gyruda, Doom of Depths Halo Forager Hidetsugu and Kairi Hostage Taker Kotose, the Silent Spider Lazav, the Multifarious Master of Death Nightkin Ambusher Possessed Skaab Psychic Symbiont Ramirez DePietro, Pillager Rilsa Rael, Kingpin Rona, Disciple of Gix Runo Stromkirk Skull Skaab Snooping Newsie Sphinx Summoner The Cyber-Controller The Mouth of Sauron Ukkima, Stalking Shadow Ulamog's Nullifier Vampire Charmseeker Whisper Agent
Leinore does not provide as much value as Wilhelt does, in my opinion, and the combination of Green and White is not exactly the strongest two colour combination
Betor, Ancestor's Voice Two generic, one white, one black, one green legendary creature - Spirit Dragon - 3/5 - Mythic Rare Flying, lifelink At the beginning of your end step, put a number of +1/+1 counters on up to one other target creature you control equal to the amount of life you gained this turn
But just how valuable can these cards get
TL;DR: OPTCG tournaments: locals run 4-6 Swiss rounds at local game stores, regionals run 7-8 Swiss + top 8, Championship Series majors run 9 Swiss + top 8