This here is a team composition I thought of that could prove to be quite powerful. These champions either have a passive or ultimate that is affected by the death of a champion.

Interesting enough these are the only champions with these types of abilities and they also make a very well balanced team.

Mordekaiser is the Tank
Yorick is the Off Tank
Zilean is the Support
Kog'Maw is the Carry
Karthus is the Mage

I believe that in a team fight the Masters of Death would overcome their demise and seek revenge upon those who tried.

Anivia also has a passive the involves her death but it doesn't fit the team as well as the other's do.

Just a quick question here. Does anyone know what happens when both Zilean's and Yorick's Ultimate are cast on the same champion and that champion dies? Answers or thoughts would be highly appreciated. Thanks.