In a Two-Headed Giant game, Skirsdag Supplicants ability causes each player to lose 2 life, so each team loses a total of 4 life
This red and black Elder Demon has some built-in protection with a ward cost of two lives, not the strongest, but can still add up over time
The 3/3 it creates initially makes that Saddle 5 easier than it looks, and even if you never use it, this is a big problem for your opponent to deal with
For each color, you can bring a card back to your hand to act as a powerful mid-to-late-game refill
What is the cheapest way to start collecting them
It can also go in many combat focused decks, especially ones that might manipulate combat and get those opposing creatures a-tapping