This allows for shenanigans with any artifact that has built in cost reduction mechanics like Myr Enforcer or Metalwork Colossus, potentially turning a card that costs nothing into a defensive fortress like Darksteel Forge or a deadly finisher like Blightsteel Colossus for hilariously discounted rates
10 Tricky Terrain Everything On Anything One of the Modern Horizons 3 Commander Precons, Tricky Terrain was all about putting everything counters on your lands and creatures
As you progress to putting together your own ideas and building more and more effective decks of your own, one of the tools that will serve you well is the ability to recognize the criteria that makes some cards "always" better than others (so you can pick them)
Replace them with Wash Away and Thought Vessel
Over the years its become a much-debated focal point on whether it should be banned or not, whether its healthy or leads to degenerate battlefield states too early in the game
The result is that abilities that cost mana are generally harder to use than you might expect because so many things are asking for your mana