Even in the best-case scenario where an opponent immediately kills Thalia, she's already cost them one mana more than they built their deck to spend, and likely delayed their curve by a turn
Three more reprints merit a shout-out here: Liliana, Dreadhorde General, Darksteel Colossus, and Omniscience
This feels like it combines some of the best Green abilities and lets you choose which one you want as needed
This is a comfortable ratio for me because drawing too many non-inkable cards can make you quickly fall behind, but some people don't mind taking a higher risk and adding more non-inkable cards to their deck
To go back to Fenrir for a second, lets evaluate the card in terms of card economy: Fenrir replaces itself on ETB with a land, putting you at card parity
In general, Alpha cards (and all other cards from 93/94) are harder to counterfeit than modern cards