Theres no new driving factor here empowering the cards popularity, for instance, as its been sideboard tech in Legacy for decades
This is as cheap as it is ever going to getas to get the effect this cheap required multiple double strike colors working togetherunless we decide to try out a zero-power version (Boros the Doubleblunt, R/W, 0/1?)
But it also means that it may not always be the most potent choice in a given situation
As you can see in the top left, this card is named Walking Corpse and its mana cost is one generic mana and one black mana (often shortened to one and a black or one black)
It starts off as a 3/2, so when it starts getting counters, it will already have good stats that get progressively better
Mangara, the Diplomat will let you draw a card if more than one creature attacks you, and Brash Taunter stands ready and able to block the largest, non-trampling creature thats attacking you