Quote:
Corpses of the Lost
{2}{B}
Enchantment
Skeletons you control get +1/+0 and have haste.
When Corpses of the Lost enters the battlefield, create a 2/2 black Skeleton Pirate creature token.
At the beginning of your end step, if you descended this turn, you may pay 1 life. If you do, return Corpses of the Lost to its owner’s hand. (You descended if a permanent card was put into your graveyard from anywhere.)
Copying with Estrid gives another 2/2 and also copies the +1/+0 buff. Each time you fetch (or you sac a Saga, Hopeless Nightmare etc) you can return to hand and hardcast for another token too. With the buff and all the tokens having haste it seems it would end games very quickly. (Similar to History of Benalia in that sense)