It's a great building block for green decks to ramp into more powerful spells and creatures
Big G is a fantastic, iconic black card, and one thats certainly worth the price of a pack
Bulbapedia Wizards of the Coast)
Dancer's Chakrams and Glider Staff are two quick examples of equipment in white's long history of equipment that are great ways to spend extra, mana, especially in the post combat main phase, say after you've attacked with the equipped creature and want to move it to a blocker
Add in one more accelerant, like Birds of Paradise, Llanowar Elves, orheaven forbidSol Ring, and your hasted beater swells
Flareon ex and Primarina ex are also interesting cards to experiment with in matches, although theyre admittedly not the strongest options for Fire-type and Water-type ex cards in the current competitive scene