Warmogs: can double the health of some champs. Way too much health for a single item. Makes Levethian obsolete. This gets worse when combined with Atmas.
Rod of Ages: Too much of everything on a single item. It makes some champs like Brand, Annie, Kassadin too powerful early on.
Neither of those items are OP.
They are worth less than they cost when you first buy them, and you have to BUILD their value over time.
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