According to Menery's official statement, the MtG card was so powerful it should've been banned because players did not have to "sacrifice a spot in the 100 to use play it," meaning that any Magic: The Gathering player could use the card so long as they were playing the right colors at the time
But some card drawing effects are really broken, so we'll find three more cards above this hall of famer
During your Main Phase: You can Special Summon this card from your hand to your opponent's field in face-down Defense Position, or if your opponent controls more monsters than you do, you can Special Summon this card face-up on your field
Affordability & Market Trend: Initially, this card was quite pricey (around $130 shortly after release, as collectors chased it) (reddit.com)
Being a Theros-themed god, Heliod isnt always a creature, which makes for a difficult-to-remove commander thats also an indestructible enchantment