Is Dark Suspicions legal in Standard, Modern, and Commander?

Dark Suspicions is legal in: Legacy, Vintage, Commander.

Dark Suspicions

Q: What type of card is Dark Suspicions?

Dark Suspicions is an Enchantment. Its oracle text reads: "At the beginning of each opponent's upkeep, that player loses X life, where X is the number of cards in that player's hand minus the number of cards in your hand."

Enchantment

At the beginning of each opponent's upkeep, that player loses X life, where X is the number of cards in that player's hand minus the number of cards in your hand.

Set Planeshift

Rarity Rare

Mana Value 4

Artist Matt Cavotta

Collector # 40

Scryfall Gatherer