User blog comment:Iamthelegion/Game On! Rap Battles news with Sans/@comment-27019625-20160216013005/@comment-25263388-20160216014110

Actually, it has "a rival" highlighted because it's a pun on arrival, as in the arrival of my series, and isn't a hint.

Tri is a pun on three and try. And maybe also a hint....

Kratos is a great guess, but who against???????