To extend: Assuming your opponent did not interrupt your plays, Gold Pride helps extend your board by adding additional interruptions such as Synchro Summoning into ANY Synchro Monster (can only use Gold Pride Monsters) and Fusion Summoning into Pin Baller, which can non-target equip any Monster your opponent controls, up to the number of Fusion materials used for Pin Ballers' Summon
There have also been a couple of recorded sales of PSA 10 copies of this card, selling for close to $1000.00

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Paying 10 life is a lot less when you start on 40 in EDH, and being able to untap all your lands is a very powerful effect, especially when there are a bunch of pretty easy ways to gain either a tonne or infinite life going around
The card has been given a grade 9 by BGS with three sub-grades at 9.5 for its centering, corners and surface which is higher than any other fourth print Charizard in the world
Even though this is one more mana than a similar card like Slaughter the StrongSlaughter the Strong, if your deck wants more of that kind of effect, this is for you