What type of card is Isamaru and Yoshimaru?

Q: What type of card is Isamaru and Yoshimaru?

Isamaru and Yoshimaru is a Legendary Creature — Dog. Its oracle text reads: "Whenever another legendary creature or creature with mana value one enters the battlefield under your control, put a +1/+1 counter on Isamaru and Yoshimaru."

Isamaru and Yoshimaru

Legendary Creature — Dog

Whenever another legendary creature or creature with mana value one enters the battlefield under your control, put a +1/+1 counter on Isamaru and Yoshimaru.

Set Unknown Event

Rarity Rare

Mana Value 1

Collector # RW02b

Scryfall