This card is an absolute beast
As you get to chose what you counter you will tend to only counter high value targets so as to minimise the relative drawback
Strictly speaking, it also didnt exist in Legends because Legendary was called Legend back in the 1994 (as well as a few years after that) and was meant to be a Creature type only (and some really awesome Lands)
First, we have Myr Adaptor from an old file: CA01_BCN Squire Gnome 1 Artifact Creature - Gnome 1/1 CARDNAME gets +1/+1 as long as it's equipped
To get use out of this as your commander, youd have to find ways to get Sam back to your hand or let it die
For example, in the current iteration of the Journey format, Gardevoir [CRE], Gyarados [TEU], single-prize Rapid Strike Urshifu [BST], and Zapdos [TEU] have proven to be some of the best Pokmon online decks