Yes, the pun is intentional.
RD/CP01-JP020 聡冥のフォロール Soumei no Followl (Followl of Wisdoom)
Level 3 LIGHT Fiend Normal Monster
ATK 1100
DEF 400
闇の理の探究者。大陸の覇を争う王に仕えているが、その胸中が語られことはない。
(A researcher of the dark truth. He serves the king who seeks to take over the entire continent, but its true intentions are unknown.)
Note: 聡冥 is a play on 聡明 (Wisdom, Sage-like Wisdom), except the last Kanji is switched with 冥 (Glooms, i.e. Underworld).