Jak'sho, the protean is a mythical item in League of Legends.
It costs 3,000 gold and gives the following bonuses:
Bonus of Jak'sho, the protean:
+20 cooldown
+400 life
+30 armor
+30 Magic Resist
Mythic Passive:
- Each legendary item gives 5 more armor and 5 more magic resistance
Single Passive:
- For every second in combat, gain 3 bonus armor and magic resist for 6 seconds. And stacks max for 8 seconds (so 24 armor and 24 max bonus magic resistance)
- When fully stacked, damages enemies at 700 units of 3% of their max HP in magic damage, damage is reduced to 0.9 for monsters and minions. Heal the damage dealt champion. At the end of the fight, increases the total resistance of 15%.