Until end of turn, you may cast that card
With these abilities, it means you can ignore powerful countering effects such as Force of Will or Chalice of the Void
Its a callback to a cycle of battlemages in Planeshift that I think are way underplayed in Commander
I've never built around Necrotic Ooze, but I'm pretty sure infinite mana combos aren't that hard to find
It saddles and crews with its toughness, and not many Mounts or Vehicles need more than four
The term "ramp" in Magic: The Gathering refers to any spell card that generates a net positive amount of mana, whether that be through floating mana that expires at the end of the phase, lands placed onto your side of the field (though some count searching up lands to put into your hand as ramp as well), or artifacts and cards that create artifacts that can tap for mana