A Nexus is likely able to do more damage over the course of a game than either of these but these are able to threaten twice the damage at the same mana investment on any given turn
It remains a 2/2 colorless creature with no name, types, or abilities, and no mana cost
That's nasty good in all of the places, like in tokens matter with Green dorks, aggro to refill your hand, or landfall making dorks like Insect tokens from Scute Swarm to draw a ton cards in decks with just Green or other colors like Simic Landfall or Selesnya Tokens
Loot, the Key to Everything Mass card draw works well with extra turns because you can chain them and snowball into a massive advantage
This is especially useful if you need to remove an opposing threat, even one that is indestructible, in a hurry
Ascend cards need to have before and after effects