Is Wiitigo legal in Standard, Modern, and Commander?

Wiitigo is legal in: Legacy, Vintage, Commander.

Wiitigo

Q: What type of card is Wiitigo?

Wiitigo is a Creature — Yeti. Its oracle text reads: "Wiitigo enters with six +1/+1 counters on it.At the beginning of your upkeep, put a +1/+1 counter on Wiitigo if it has blocked or been blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it."

Creature — Yeti

Wiitigo enters with six +1/+1 counters on it.<br>At the beginning of your upkeep, put a +1/+1 counter on Wiitigo if it has blocked or been blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.

Set Ice Age

Rarity Rare

Artist Melissa A. Benson