mtg best green card draw makes big bodies, and using those big bodies to cards is one of the ways to leverage that. Life's Legacy is sorcery speed which is a downside, but it's Some budget green card draw

But, Mondrak, Glory Dominus does have an ability to give it an Indestructible counter to better protect it

I might only have a few of them on the battlefield, a mix of card draw engines, sacrifice outlets or my commander, usually none of those want to be on the receiving end of a mandatory block

You could tap a Grim Monolith or Mana Vault for a Tinker, sacrifice the tapped artifact for a Jar, and then go off

Dont forget to sleeve

Its likely that Assure will gain a bunch of value in a post- Ixalan world, but in the meantime, well have to settle for one of the most powerful combat tricks in the format, with a cheaper combat trick thrown in for backdoor purposes