If you like to build a strong foundation that's difficult to stop once it's rolling, this is a solid choice
Commander Qty: 1 Price: 47.00 Sephiroth, Fabled SOLDIER Whenever Sephiroth enters or attacks, you may sacrifice another creature
Sadly, the non-Promo version currently only shows a value of $11.88 on TCGPlayer, but for people looking to play the game, there is no mechanical difference between the two cards
Rikku also comes with an activated ability that lets you Steal opposing counters, and her ability to make a creature that gains a counter unblockable for a turn works very nicely alongside Tiduss proliferate trigger
These box sets are what I'd prioritize
The set will include Stitch, Elsa, Cruella De Vil, Maleficent, Robin Hood, and Captain Hook, and there will also be a special Mickey Mouse promo card