> The red (Lightning Bolt), green (Giant Growth) and black (Dark Ritual) are very solid cards and were seen in most decks of their respective colors in the early days of Magic, would be a bit too powerful today.

I don't think those three are super comparable; Dark Ritual is much stronger than Lighting Bolt, which is much stronger than Giant Growth. Dark Ritual has purposely not been printed in a "standard legal" set since 1999; it's not legal in the Modern format (cards printed in standard sets since 2003), only in formats that allow cards from any time period. Lighting Bolt is legal in Modern, with its last standard printing being in 2010, although the head designer has indicated that they wouldn't print it in a standard set now. Giant Growth was printed in a standard legal set just last year, meaning it's still currently legal to play in the Standard format (roughly speaking, cards printed in standard sets in the past two calendar years).