Is Whispering Specter legal in Standard, Modern, and Commander?

Whispering Specter is legal in: Modern, Legacy, Vintage, Commander.

Whispering Specter

Q: What type of card is Whispering Specter?

Whispering Specter is a Creature — Phyrexian Specter. Its oracle text reads: "Flying Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, that player discards a card for each poison counter they have. Power/Toughness: 1/1"

Creature — Phyrexian Specter

Flying

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, that player discards a card for each poison counter they have.

Power/Toughness: 1/1

Set New Phyrexia

Rarity Uncommon

Mana Value 3

Artist Jason Felix

Collector # 77

Scryfall