Tyrant Dice

Explodes when summoned; on its own it explodes every 10 seconds (DC Inside).

In Random Dice 2

• Class / type: Chaos tree
• What it does: Explodes when summoned; on its own it explodes every 10 seconds (DC Inside).
• Notes: English name not yet official (translated from the Asian release)

Other dice

Sources: oslink.io, w.atwiki.jp, gall.dcinside.com