It's scp 2521. Any form of information about him can't be written or spoken. Any information written about him will be taken away by him . Any people talking about him will be taken away by him. He can leave his containment anytime he wants. Hebis considered to be a meter class scp
Do not, under any circumstance, talk about it, write about, or depict it on any way. It will summon it. Hence, all you can use are very abstract symbols that do not give away its identity.
A bit more messy than the SCP article it is based around, but still pretty decent. Mostly the presentation itself doesn't do it any favors in terms or readability.