They were hugely sought after, with most approaching $100 in price and some reaching several hundred dollars
If Sanctum of Calm Waters leaves the battlefield while its ability is on the stack, you may control no Shrines as the ability resolves
The most common way to take out a creature this large was to use black removal spells, and Sol'kanar was both black and had swampwalk to punish the owner of the spell for looking at him funny
Mega Gyarados ex is a pretty insane closer - it's almost impossible to OHKO and 140 damage kills a lot of shit
He was literally the biggest, scariest creature in the game in 1993, and with both Animate Dead and Dark Ritual in the first set, he could hit the battlefield well before turn seven, so he was a very in-demand card
Blue Ice Magic (decent) Ice Magic is basically Unsummon, Griptide, and a weird 8-mana removal spell all at once