The latest iteration, Modern Horizons 3 , was a Draft-legal set on MTG Arena, and this set alone put powerful archetypes such as Eldrazi and energy into the top tier, not to mention isolated designs like Psychic Frog or Nethergoyf
2024-04-12 You must choose at least one of the listed modes and pay its associated additional cost in order to cast a spell with spree
Nowadays, that legendary clause means less and less, as legendary creatures are everywhere
Casting Cost: Card Text: Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Creatures with power less than Elusive Otter's power can't block it
Dont get me wrong, there has been more broken stuff, but its always been surrounded by other broken stuff and weird metagames evolved
55/45 or better on back