"I am the simplifier, the root that drags all artifice to earth."
—Seal inscription

「我は平易成すもの。すべての術策を地に引き込む根。」 ――印章に刻まれた言葉

原基の印章

原基の印章を生け贄に捧げる：アーティファクト１つかエンチャント１つを対象とし、それを破壊する。

「吾乃释繁者，是为匡俗济世之本始。」 ～缄印铭文

原基缄印

牺牲原基缄印：消灭目标神器或结界。

Seal of Primordium

Sacrifice Seal of Primordium: Destroy target artifact or enchantment.

Time Spiral Remastered

Modern Masters 2017

Planar Chaos

This is not modal. If the target changes from an artifact to an enchantment or vice versa, this still destroys it.

You can activate Seal of Primordium's ability targeting Seal of Primordium itself if you want it to leave the battlefield. This is because targets are chosen before costs are paid. The ability won't resolve as it tries to resolve.