This lets you pick and choose who you want to keep close, and who you want to give extra resources too
Falkenrath Reaver is a 2/2 red Vampire that is cast for one generic and one red mana and has no abilities or mechanics associated with it
Basically, regenerate shields a creature from lethal damage or destroy effects
Occasionally the Arena programmers will adjust these digital cards to power them down if they end up being too strong, or powering them up if they dont play as well as the designers hoped
For two mana, you get a Black Sorcery spell that can destroy any creature or enchantment you want, and the only other cost is that you lose life equal to that cards mana cost - thats not a bad thing with Deaths Shadow
Hope itself has lifegain too, so you can Voltron it and try to win via a mix of damage and mill while gaining some life so you arent defeated too easily