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
The Earth Crystal BPhillipYork: Well counter doubling can be good, and it really has lots of support for counters, the doubling, and then the ability to distribute them, which inherently gets doubled
Verdant Command in Modern Horizons 2 was the most recent, and before that was Ouphe Vandals back in Fifth Dawn
For those who want to crash through combat: Caesar, Legion's Emperor, Jetmir, Nexus of Revels, and Ghired, Conclave Exile are terrifying options