Cooling/Heating replace Crit

I was thinking about 2 new stats that could replace crit. You can only have one of the two stats add ones:

#Heating up

Every second while in combat increases your damage by 10% (up to 50%)

• : Heating cap increased to 70%
• : New build: +
• (rework): Now is the heating up stat

#Cooling down

You start with 50% damage increase, every second while in combat this bonus decreases by 10% till zero.

• (rework): Now is the cooling down stat

This would split the AD itematisation into 2 groups:

• Early Adc: ,etc
• Lategame Adc: , etc

Heating up & Coolding down could work on certain abilities like Graves Q, GP Q, Ezreals Q, etc... The new crit also options better itematisation for assassins like but also with more counterplay if they didn't manage to burst down the target.