Is Dampen Thought legal in Standard, Modern, and Commander?

Dampen Thought is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Dampen Thought?

Dampen Thought is an Instant — Arcane. Its oracle text reads: "Target player mills four cards. Splice onto Arcane {1}{U} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)"

Dampen Thought

Instant — Arcane

Target player mills four cards.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Set Modern Masters

Rarity Common

Mana Value 2

Artist Arnie Swekel

Collector # 39

Scryfall Gatherer