If you are (and you should), it's a pretty cheap and reliable way to always have some threat on the board and really get the most out of the archetype by just going wide and smacking face
As for the card itself, Stone of Erech is an interesting way to utilize graveyard hate in multiple formats
Treeguard Duo Rarity: Common TYPE: Creature SUBTYPE: Frog Rabbit CMC: 4 Mana cost: USD: $0.22 EUR: 0.07 TIX: 0.03 EDHREC RANK: 7384 (3/4) When this creature enters, until end of turn, target creature you control gains vigilance and gets +X/+X, where X is the number of creatures you control
Since Commander Masters is an all-reprint set with no specific plane or worldbuilding in mind, these commander precons pull from popular archetypes and settings across all Magic
This is especially true if you play it in a deck that is made up entirely or almost entirely of creatures with less than 4 power
We felt it served a very important function in the game keeping dangerous combo pieces in check