Set 16 Unlockable Units

Aurelion Sol
Field Targon 5 in Combat
Baron Nashor
Level 10 + Void 7
Brock
Collect 500 Ixtal Clues total
Ryze
Level 8 + Field 4 region traits together in combat
Sylas
Sell a 2-star Jarvan, a 2-star Garen, and a 2-star Lux
Zaahen
Get the Xin Zhao Champion Augment + field a 3-star Xin Zhao for 5 rounds
Aatrox
Field a unit with 40% Omnivamp in Combat + Level 8
Galio
12 star levels of Demacia
Mel
2-star Ambessa with 1 item dies
Sett
Level 8 + Field only 1 unit in the first 2 rows of combat
T-Hex
9 Piltover star levels
Tahm Kench
Spend 500 Silver Serpents
Thresh
Collect 150 Souls
Volibear
Level 8 + have a unit with 3800 Health
Xerath
Alternate winning and losing 3/4/5 times with Azir
Ziggs
Field a Yordle or Zaunite with 3 items and Level 9
Diana
Field a 2-star Leona with 3 items in combat
Fizz
Field 5 Yordles or Bilgewater units + Level 7
Kai'Sa
Field a Longshot with 3 items in combat + Level 8
Kalista
Collect 75 Souls
Nasus
Lost 2/3/4 combats with Azir
Nidalee
Field two 2-star Neekos in combat together
Renekton
Win 2/3/4 combats with Azir
Rift Herald
Have Void active for 8 player combats
Singed
Take 30 damage and 4 Zaunites or Juggernauts
Skarner
Field a non-Tank with a Gargoyle's Stoneplate in combat
Veigar
Field a unit with 2 Rabadon's Deathcaps in combat
Warwick
2-star Jinx & 2-star Vi
Yone
3-star Yasuo
Darius
Have Draven drop 1 gold
Gwen
Collect 20 Souls
Kennen
8 star levels of Ionia, Yordle, or Defender
Bard
Reroll 4 times before Stage 2 Carousel
Graves
Field a Twisted Fate with 2 items in combat
Orianna
3 Piltover or higher
Poppy
Field a Demacian or Yordle with 2 items in combat.
Tryndamere
Field an Ashe with 2 items in combat
Yorick
Field a 2-star Viego with 2 items in combat.