They help guarantee land drops
it's a one-time trigger when he's played, not a repeatable effect you activate turn after turn
Not only do they send cards to the graveyard, which synergizes exceptionally well with reanimation strategies or mechanics like delve, but they also have basic land types, making them fetchable with lands like Scalding Tarn
Im also including the popularity ranking of each Doctor on EDHREC as a comparison
The Ruby/Sapphire starter deck leans heavily into the Dual-Ink mechanic that Archazias Island is really known for, letting you leverage fun and creative combos between a diverse set of cards
(Theyre a smidge out of date, featuring the now non-Standard EX/GX cards, rather than Vs, and still feature Fairy Energy that is now dead