Grixis combines red, black, and blue in what is commonly called a shard. These three colors allow for a weird mix of chaos and control strategies, upsetting your opponents' games while keeping your own on track as much as possible
If you dont need to draw and need to push damage through, it can also switch to a mass pump spell
In Armageddons case, cards outside of lands ramp you, like Smothering Tithe or mana rocks
(You may cast this card converted for 2B.) Flying Whenever you draw a card, if you're the monarch, target opponent loses 2 life
As strong as these lands seem, they see significantly less play in older formats
The caster gets to choose which pile they put into their hand and which they put into their graveyard