Adaptive strength is a pseudo-statistic used by Riot as a shorthand for effects that grant attack damage or ability power, depending on which of the two stats the user has already acquired extra.
Adaptive Force has a default output for situations where the user has no or equal bonuses, which Riot claims is based on the champion. However, tests have shown that this is actually based on the source of the Adaptive Force (and most often it is DA).
Adaptive damage It is a type of damage that depends on the difference between additional AD and additional AP: for units with more additional AD it is physical damage, for units with more additional AP it is magic damage.
In most cases, League of Legends omits the adaptive strength in favor of showing the amount of DA or PH awarded.
Summary
Increase Adaptive Force
Champions
You and I! from 
Yuumi
Objects
Potion of Rouge Stolen
Runes
Absolute concentration
Conqueror
Eyes Collection
Rising Storm
Phantom Pore
Significance 
Walk on Water
Zombie Sentinel
Adaptive Strength Rune Fragment
