The most common card collections are from the first five sets and the promotional cards that came out during the time: No set symbol or logo: Base Set Flower: Jungle Fossil claw: Fossil 2 behind a Pokball: Base Set 2 (This was the first reprint set that featured cards from both Jungle and the Base Set.) R : Team Rocket You might also see a black star with the word promo over it official Black Star Promos
Its drawback may look like its very punishing and can allow the opponent to surprise you via a mid-combat spell, but I never really saw that scenario play out since its damage prevention ability is a a conditional static ability so as long as its on when damage is dealt, it wont be prevented. (Thank you, @fenaris!) It usually plays out somewhat like a colorless Ashenmoor Gouger / Chimeric Idol where you typically dont bother trying to block with it (why am I blocking with my aggro guys anyway?) and, if need be, you cast a spell pre-combat to activate it (typically I used a large coin, like a quarter, to denote whether it was on or off)
while we still have Black Market Connections and Revel in Riches, the mono-colored color identity really hurts this strategy, and Plums Treasure production is inconsistent due to the requirements of an artifact in the graveyard and keeping a 2/2 attacking
Contaminant Grafter is an excellent poison payoff neighboring the precon alternative commander, Vishgraz, the Doomhive
Shes not hard to turn on, and growing the team alongside an untap is a kingly gift
