from the vault mtg card list Magic: Gathering you may pay 4 From the Vault: Twenty (V13)

not legal in sanctioned Commander play)

Obstinate Baloth is a bit dull but has added value from the anti discard and good synergy with Birthing Pod with fewer utility creatures costing four

Whats better than removing a threat

Notably, opponents can't try to remove the creature you wish to sacrifice

While Kronk is a strong choice for decks requiring protection and hand preservation, there may be better options for more aggressive strategies, such as Louis - Swift Strikes, who provides offensive capabilities and tempo advantage

There isnt much fixing outside of Landers, and Landers themselves are hard to come by outside of Green decks