first edition pokemon cards value list Most valuable 1st Checklist & Price Guide Pokemon TCG Base Set Checklist:

Illustrated by Arif Wijaya Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Not Legal Comp

Monstrous required mana, while renown requires successfully attacking

Thought it was a pretty cool marketing idea and they got me to it some coffee

Add on the previously mentioned Fountain Watch, and the only way anyone is getting rid of you is by a mass exile spell (which you can then avoid with a Guardian of Faith of Teferi's Protection)

Pair it with the likes of Magmakin Artillerist or Marauding Mako (both also from this set) and you get an awful lot out of that three mana