It won't win the game on its own, but infinite mana will almost definitely put you far ahead of the rest of the table
Here are 2 of the misprints from the Pokemon Base set: Ninetales Holographic No Damage Error (Base Set) : One of the most famous misprints, this card was printed without its '80 damage' value
For example, if you've spent three mana on spells so far this turn and you control a permanent with an ability that triggers "whenever you expend 4," that ability will trigger the next time you spend at least one mana to cast a spell this turn
The image after histogram equalization
After starting the Modern border with Mirrodin, that block also introduced an ability called indestructible that prevented your creature from dying
*Smiles in Orzhov* Deathleaper, Terror Weapon Flash and haste are my two favorite keywords to see on the same card