Known for its incredible durability, Onix can crush boulders with ease
When I say vintage Im talking the early years of Magic: The Gathering during that period of 1993 to probably the late 1990s
This is likely in no small part due to the lower saturation of clue and treasure tokens, a more open-ended design, and being bookended by Jhoira, Weatherlight Captain and Niv-Mizzet, Parun on either side of their printing
With that change to gameplay, all of a sudden the draft picks get turned around because those expensive spells are very attractive, and the efficient creatures and other cards with more pips become much worse
Second, taking any damage removes a counter, so opponents are highly incentivized to keep you in check
Typically the most broken things that happen in the early game do so not because of them directly, but more so due to the various free effects that push players ahead a turn in development