Final boss - The Doom Wiki at

The final boss (often informally called the Icon of Sin because of the Doom II level of which it is a part) is the final boss of Doom II, in MAP30: Icon of Sin.

Vagary, Doom Wiki

Boss (video games) - Wikipedia

Arachnotron (Doom Eternal), Doom Wiki

Speardovich - Super Mario Wiki, the Mario encyclopedia

Icon of Sin (Doom Eternal) - The Doom Wiki at

A_BrainScream - The Doom Wiki at

Samur Maykr, Doom Wiki

A_BrainSpit - The Doom Wiki at

Doom 3 - The Doom Wiki at