Returning a cheap creature with an enters or dies trigger to your hand makes paying two mana and two life seem like a small price to pay as you repeatedly drain lifedrain life, make tokensmake tokens, draw cardsdraw cards, make the table sacrifice creaturesmake the table sacrifice creatures, or worst of all, mill more cardsmill more cards to get better stuff back into your hand
These go all the way back to Alpha, the first MTG set officially released
All you have to do is evolve it a few times and you wont have any trouble keeping a full grip
There are a lot of six-mana enchantments in New Capenna that wont see play in formats like Standard, but will become cornerstones of obnoxiousness in Commander
Release Date: 2022-05-20 (Delayed 2022-06-17)
The inclusion of deathtouch and haste is nice, but Mardu Siegebreaker still needs to potentially put itself in harms way in order to do its thing