mtg commander deck construction structure Rules & Deck-building Template Slides for the Commander format. Not sure on the quality, but it'll do for now. : r/mtg I made a tool that

It's helmed by Nalia de'Arnise, a spellcasting Rogue from Baldur's Gate II

You may play a land this way only during your own turn and only if you have not yet played a land this turn

That's not true of MTG Modern Horizons sets, however, which feature reprints and brand-new cards being made specifically to enter the Modern format (and beyond, into Legacy and sometimes Vintage)

If you would like to go down that road, Tainted Pact, and Demonic Consultation are your best friends

Its got a nice Unearth kicker built into it, and it works very well on its own, but its best in a deck built around bat synergies so you can trigger more lifegain