Stacking up extra counters has a wide range of uses, from buffing your creatures to killing your opponents with poison
This week, for that holiday nostalgia fix, please enjoy this transcription of the original rulebook (Alpha edition, with some Beta updates intermixed) that came with Magic: the Gathering
Yes, the white cards that draw you cards when your opponent casts spells cover the full range of only use in special cases to format staple. The best such card is Esper Sentinel, which requires opponents to pay mana to cast noncreature spells or you'll draw you a card
While this color pairing may have seemed an odd selection for Energy at first, these two decks have done wonders for grounding Energy in a viable Jeskai identity moving forward.
This is about as bad as it gets in terms of payment model, except for situations where you couldnt do anything for free