Being powerful also helps with some even being looked at in competitive play
Id make an Assassins Creed reference here if I knew anything about the series
You can use it to block then sacrifice it to fetch your two lands or use its death to trigger some effect, something along the lines of a Grave Pact maybe
Thanks to Eleven's Grixis colour identity, she already has access to the extensive card draw capabilities of blue and black, making getting above eleven cards ridiculously easy without her built-in draw
Evoke allows you to pay an alternative, cheaper cost for a creature to trigger its "enter" effects at a discount, but the creature is sacrificed after those abilities trigger
Samwise Gamgee Samwise Gamgee is a powerhouse for enabling infinite combos, especially when paired with Cauldron Familiar and any sacrifice outlet that doesnt require mana, like Viscera Seer