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
Verdant Command in Modern Horizons 2 was the most recent, and before that was Ouphe Vandals back in Fifth Dawn
Magic: The Gathering recently announced another round of terminology changes to the venerable trading card game, including decoupling Rakshasas from cats and finally allowing Naga and snake creatures to live in the same house
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
Unfortunately, to get all this card draw, you do have to pay for it each turn
For those who want to crash through combat: Caesar, Legion's Emperor, Jetmir, Nexus of Revels, and Ghired, Conclave Exile are terrifying options