Not Updated For Current Season
Mordekaisers power early game comes from his ability to withstand harass with his shield as well as hp Regen. Always make sure you can hit more than 3 minions with your Siphon and your shield will be strong early game. Coordinate with your team mate when you are going to ghost chase to make a kill, which will normally turn into a double kill due to the amount of AoE you do. Once you hit lvl 6 play a little defensively, once one over extends with less than half hp ghost, Ulti, ignite and lol as you pick up a quick double kill in their turret with your newly acquired minion. Mid game, don't be afraid to initiate as your spells will slow them. Don't use Mace of spades as much as a damage dealer but more as a continuation of your slow. Keep your shield up with siphon. Keep in mind to pick off the unsuspecting low hp dps with ignite, Ulti combo.Then use that minion to corner your enemies.
Main tips to playing Mordekaiser
If you are low on health never under estimate how much your ulti can turn an obvious 2v1 death into a double kill.
Use your minion as a tank to BD a turret if near one
Any questions, leave a comment.
My normal K/D/A with this build is 20+/5-/10+
Becareful of Zilian and Ezreal, they can time out your shield very well, and will hurt your early game, best bet is to swap lanes with another that can handle them.