mtg meren commander deck of Clan Nel Toth Graveyard Reanimation Sacrifice Magic choose target creature card in your graveyard Insider: Statistical Analysis of Commander

And it's not hard to see why: not only does it allow you to swing with It That Betrays as soon as it comes into play, it also protects it from eating a well-timed Murder

For online Magic, where changing a card can be done by altering some lines of code, this is much more common

If you go straight red, youre missing out on blue counterspells, greens great creatures, blacks unconditional removal, and so on

With cards like Kruphix, God of HorizonsKruphix, God of Horizons, Inga and EsikaInga and Esika, Xolatoyac, the Smiling FloodXolatoyac, the Smiling Flood, and others, you can spend a lot of mana on other players' end steps to ensure they don't have as many opportunities to disrupt your game plan and to allow you to keep your own disruption spells castable at a moment's notice