Yes, you can use a die for coin flips

Ifrit Common 164/585: Suplex Common 165/585: Thunder Magic Common 169/585: Warriors Sword Common 171/585: Airship Crash Common 173/585: Balamb T-Rexaur Common 174/585: Bards Bow Common 176/585: Blitzball Shot Common 178/585: Chocobo Kick Common 182/585: Commune with Beavers Common 187/585: Gigantoad Common 188/585: Goobbue Gardener Common 189/585: Gran Pulse Ochu Common 190/585: Gysahl Greens Common 192/585: Loporrit Scout Common 193/585: Prishes Wanderings Common 202/585: Summon: Fat Chocobo Common 209/585: Town Greeter Common 252/585: Adventurers Airship Common 254/585: Blitzball Common 259/585: Instant Ramen Common 260/585: Iron Giant Common 262/585: Lunatic Pandora Common 263/585: Magic Pot Common 265/585: Monks Fist Common 270/585: World Map Common 271/585: Adventurers Inn Common 273/585: Baron, Airship Kingdom Common 276/585: Crossroads Village Common 278/585: Gohn, Town of Ruin Common 280/585: Gongaga, Reactor Town Common 281/585: Guadosalam, Farplane Gateway Common 282/585: Insomnia, Crown City Common 287/585: Rabanastre, Royal City Common 288/585: Sharlayan, Nation of Scholars Common 290/585: Treno, Dark City Common 291/585: Vector, Imperial Capital Common 292/585: Windurst, Federation Center Common 294/585: Plains Common 295/585: Plains Common 296/585: Plains Common 297/585: Island Common 298/585: Island Common 299/585: Island Common 300/585: Swamp Common 301/585: Swamp Common 302/585: Swamp Common 303/585: Mountain Common 304/585: Mountain Common 305/585: Mountain Common 306/585: Forest Common 307/585: Forest Common 308/585: Forest Common 309/585: Wastes Common 358/585: Summon: Choco/Mog Common 369/585: Summon: G.F

MTG Goldfish tells me that Crucible of Worlds has been at least $25 since 2011
Ling Imperial Soldier gives each of your Heroes an extra point of Strength
It fits in an Energy deck, sure, but it can also go into decks with Experience, +1/+1 counters, and all kinds of other counters
Flexibility isnt just about modality, though