With Ojutai, the control player could then swing once they had counterspell mana up, and upon connecting once, the game was usually over, as they could chain counterspells, other interaction, or more Ojutai
For example, if you cast Roamer's Routine from your graveyard and also tap a creature you control with power 3, you'll pay only The cost reduction applies only to the generic mana in the cost, so even if you tapped a creature with power 15, you'd still pay Omens With dragonstorms on seemingly every horizon, ill omens are ubiquitous these days
Emeria's Call is at worst a land drop and at best a flying sky force
Acid Rain + Boil + Boiling Seas + Choke + Flashfires + Tsunami The hard land destruction spells meant your opponent couldnt play the game anymore in 1994
Arcums Weathervane and Arcums Sleigh made use of Snow-covered Lands while Arcums Whistle allowed you to have a Norritt that destroyed the target creature at end of turn, unless the casting cost was paid