Gain permanent health when enemy minions or monsters die near you.
Offense
+9% Attack Speed
Flex
+6 Armor
Defense
+15-90 Health
WhyFleet Footwork
Fleet Footworks grants you additional jungle sustain as well as a bit of burst Movement Speed in skirmishes so that you're able to stick to your target.
WhyTriumph
Triumph's mid-fight heal is great for front-line tanks who can pick up multiple assists and continue absorbing damage.
WhyLegend: Tenacity
Mundo's biggest weakness is his ability to be locked down easily by CC. Legend Tenacity plus his [W] help you stick to target repeated damage threat.
WhyLast Stand
Last Stand's extra bit of damage can be the difference between dying and getting the kill.
WhyConditioning
Conditioning's extra resists synergizes well with Mundo's natural health stacking items to make you a huge front-line tank.
WhyOvergrowth
Overgrowth makes great use of Dr. Mundo's ability to power-farm his jungle for huge CS numbers.