Jumping from 3 mana to as much as 7 on turn 4 is huge, and if you dont need quite that much mana, the ability to make 2/2s later on is also solid
If they print some more comeback cards it just gets better, and some strong Grass attackers as well
As you can imagine, this rule became quite frustrating for players to deal with
The true beginning of the EX era was from the Ruby & Sapphire expansion which also happened to be the first non-WoTC release for the TCG
P/T Number 36 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Pioneer, Standard Rulings (8/23/2019) K'rrik's ability doesn't modify or reduce costs you pay