Krav, the Unredeemed [Battlebond Prerelease Promos] Island Mountain you may change "swampwalk" to

you may change "swampwalk" to "plainswalk

"The trick is

Set: Champions of Kamigawa Type: Legendary Artifact — Equipment Rarity: Rare Cost: {3} Equipped creature gets +3/+1

When the task spilled over into undeath

Juggernaut can't be blocked by Walls

Krav, the Unredeemed [Battlebond Prerelease Promos] Island Mountain you may change "swampwalk" toSet: Battlebond Prerelease Promos Type: Legendary Creature Demon Rarity: Rare Cost: {4}{B} Partner with Regna, the Redeemer (When this creature enters the battlefield, target player may put Regna into their hand from their library, then shuffle.) {B}, Sacrifice X creatures: Target player draws X cards and gains X life. Put X +1 +1 counters on Krav, the Unredeemed.