Scion of Oona At worst, this is a fairly standard lord with a slight downside (hexproof would be a vast improvement over shroud), but at best, this is the card that can mean the difference between every creature you control getting themselves killed, or doing the killing themselves
Lathril, Blade of the Elves Lathril, Blade of the Elves is the most popular elf Commander and an excellent reprint for Foundations
Bloodline Keeper is exactly what you want in a Commander deck
Unless you specifically collect vintage cards, reprints offer better value
Also, most of those Alchemy-only cards have Rare or Mythic Rare status, and earning wildcards to spend on those rarities has never exactly been easy in this game, so players will likely have a harder time completing their collection or building decks with the new cards without more time/money investment
What Cards Feature In The MTG Doctor Who Set