Is Kinscaer Sentry legal in Standard, Modern, and Commander?

Kinscaer Sentry is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Kinscaer Sentry

Q: What type of card is Kinscaer Sentry?

Kinscaer Sentry is a Creature — Kithkin Soldier. Its oracle text reads: "First strike, lifelink Whenever this creature attacks, you may put a creature card with mana value X or less from your hand onto the battlefield tapped and attacking, where X is the number of attacking creatures you control."

Creature — Kithkin Soldier

$0.61 ↗20 similarCommander, Modern

First strike, lifelink

Whenever this creature attacks, you may put a creature card with mana value X or less from your hand onto the battlefield tapped and attacking, where X is the number of attacking creatures you control.

Set Lorwyn Eclipsed

Rarity Rare

Mana Value 2

Artist Kev Fang

Collector # 22