Tiamat ap hybrid item
^
+ 
+ 800 combine = 40 ad + 80 ap + 100% base hp regen. + heals for 15% of damage dealt.
Passive ; basic attack deal in a cone 30% of ad and 20% of ap damage decreasing to (whatever ratio tiamat has) over the same range as any finished tiamat item we have.
Active. deals 60% of ad and 50% of ap to units around you
cost and all the details upto change just an example.
