At time of writing, they command high prices on the secondary market: depending on printing, their market valuations on MTG Goldfish start from $85 for Dockside Extortionist, $200 for Mana Crypt, and $95 for Jeweled Lotus
Architect of Thought is on this list because he is the only planeswalker that you can lay and guarantee getting two new cards in hand back if it resolves
On the other end of things, Stiltzkin is worth about 25 cents, showing the disparity in these bonus cards
The Enigma Force granted Peter the greatest power, and with it, the greatest responsibility
Whenever an enchantment you control is put into a graveyard from the battlefield, put a +1/+1 counter on Starfield Mystic
While all are powerful in their own right, especially with magecraft or token-matters effects, they didnt quite make the list because they serve a different purpose