Some other random goodies you might like: Maddening Hex (this would be HILARIOUS with some doublers), Chandra's Ignition (if you target something with lifelink remember it's the CREATURE doing the damage, so you can gain a TON of life off of this if the board is fairly full, and it's great with a Deathtouch source like Gift of Doom), Fire Covenant (one of the best burn spells ever), and MAYBE a Rionya, Fire Dancer since you've got all those Sorceries
Usopp Limited Card Sleeves Premium Mat vol.2 - ONE PIECE Card Game
Metropolis Reformer Metropolis Reformer is best played in lifegain decks considering it helps you gain life when its dealt damage
After all, you can't very well play if you don't know where to go
That said, investment outcomes depend on set demand, timing, and whether you buy at or near MSRP rather than secondary market premiums