The combine cost you pay after owning every component: Titanic Hydra's 50G is the lowest of 105 legendaries, Mikael's Blessing tops the ratio at 39%. Add up the fees inside the components too and the order flips. Hydra lands mid-table, and Death's Dance is last at 16%.
I ranked all 173 champions' health regen at level 1 and level 18. Leader Vi's 27 is about 2.45x Soraka's, Gnar climbs from 141st to 4th, and regen poster boy Mundo sits below average on raw stats.
Counting ally and enemy tips for all 173 champions in ddragon: 24 have none. K'Sante carries Lee Sin's tips, Milio carries Rakan's, and Akshan and Naafiri have their lore pasted in.
Out of 2006 skins, 74% of the 931 line names belong to a single champion. Spirit Blossom leads with 31, and T1's Worlds skins combined hit the same 31.
I counted the stats on all 118 completed items on Summoner's Rift. Ability Haste is the most common, on 53 items. It comes in only four values, and of the 14 crit items, only Essence Reaver also has haste.
I checked the range of all 692 abilities across 173 champions. Only 14 gain range with skill level, and nine of them are ultimates, about 5 times the rate of basic abilities. The biggest is Taliyah's Weaver's Wall at 2.6x.
We broke down the last 26 games of a KR Challenger one-trick with 1.66 million mastery points on Yasuo. Shield Bash in all 26 games, Immortal Shieldbow and Gunmetal Greaves nearly locked in mid. In losses, deaths went up 2.5x.
I checked the sell value of all 118 finished items on Summoner's Rift. 112 refund exactly 70%. The only regular finished item at 40% is Guardian Angel, which loses 1920 gold when sold, about 1.8 times what Infinity Edge loses.
Counting the max rank of all 692 abilities, almost every champion follows the 5-5-5-3 pattern that sums to 18. Only seven break it, and Udyr's 24 is the one design you can never fully max.
Checking armorperlevel across all 173 champions in ddragon, only Thresh comes up zero. Even the next-lowest, Gnar, has 3.7 — Thresh's armor never moves off his base 33.
Counting every champion's resource bar in Data Dragon turns up 11 names besides mana, and more than half of them belong to exactly one champion. Mana alone covers over 80% of the roster.
Every champion's crit and critperlevel stat in ddragon is exactly zero. Crit chance is entirely item-gated, and 12 of the 17 crit items on Summoner's Rift land on precisely 25%.