Opening Phantasmal Flames Premium Checklane Blister [Ethan's Magcargo] returns about $4.57 in card value against its $16.23 price — roughly $0.28 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in Phantasmal Flames
How expected value is calculated — card value only, from published pull rates and daily market prices.
Phantasmal Flames Premium Checklane Blister [Ethan's Magcargo] on TCGplayer