pokemon card mega shadow mewtwo Captured in a crystal Pokemon Mega Dark MewTwo X

The most interesting part of the card though is the coloured mana cost reduction

#13: Scarlet & Violet Base Set When the best hit you can pull (Gardevoir ex SIR) is worth less than the cost of the ETB, its not going to rank very high on this list

Somewhat comically, however, this card is not most well known for its use in the Commander format

Manufacturer Pokemon USA Manufacturer's Item Number 152-80079 UPC Code 820650800795 Each Pokemon XY BREAKpoint Elite Trainer box includes 8 Pokemon: XY BREAKpoint booster packs, 65 card sleeves, 45 Pokemon TCG energy cards, a player guide, 6 damage counter dice, a competition-legal coin-flip die, 2 acrylic condition markers, a collector box with 4 card dividers and a code for the online game

Considering this, so long as you dont mind creating some nasty play patterns, Omen Machine can be an extremely powerful addition to your Commander deck