For them these cards may well be on par with the original Base Set, which has POPs in the hundreds
When it attacks a Defense Position monster whose DEF is lower than the ATK of this monster, inflict the difference as Battle Damage to your opponent
Then, we can play a fetch land like Escape Tunnel, Evolving Wilds, or [[Terramorphic Expanse] to double Tifa's power twice, making it an at least 20-power trampling attacker that should be able to win the game in one attack, as early as Turn 3
Base Set 1st Edition cards are extremely rare because of the fact that they were almost all sold out before the Pokmon craze really took off in England, and so the majority of the general public never got to experience those cards in the first place
But that's not why we're here, its for that modular ability
Wildsear, Scouring Maw What if Colossal Dreadmaw cost 1 less mana and cascaded on every enchantment you cast from hand