With such weird cards being printed, Wizards of the Coast has had to find ways to make sure people don't accidentally put a card with Denimwalk (can't be blocked by a player wearing denim) or Art Menace (can only be blocked by creatures with two or more characters in their art) into their normal Magic decks
The other Infinity Stones are expected to make their cardboard debuts in later Marvel sets like Marvel Super Heroes, likely along with some payoff for assembling them all, so any players with the means to do so are picking up their copies of The Soul Stone now while its relatively inexpensive
He takes some pleasure in the sufferings of the living but far prefers the company and service of the undead
First, the Forest cards it fetches come in untapped (barring other clauses), which means you can use that mana immediately effectively reducing its net cost to 2 mana during the turn you play while ramping you by 2 lands for the rest of the game
Sorcerous Squall costs a staggering nine mana, which becomes much easier to cast since you can exile cards from your graveyard to help pay for the cost with the delve ability