XantchaHow it works & interactions with other cards

Understanding the Sacrifice

Xantcha features a single activated ability: 'Sacrifice a permanent: Regenerate target creature.' Because the sacrifice is before the colon, it is a cost. This means you can sacrifice any permanent you control—including lands, artifacts, or creatures—to create a 'regeneration shield' on a creature. This shield prevents the next time that creature would be destroyed during the current turn.

Step-by-Step Resolution

First, you announce the ability and choose a target creature you wish to protect. Second, you pay the cost by choosing a permanent you control and putting it into its owner's graveyard. The ability then goes on the stack. Once it resolves, the target creature gains a regeneration shield. If that creature would be destroyed by lethal damage or a 'destroy' effect later this turn, it instead remains on the battlefield, becomes tapped, all damage is removed from it, and it is removed from combat.

Strategic Timing

Since Xantcha is a Vanguard card, its ability is available as long as the card is in the command zone. You should use this ability in response to removal spells or before the combat damage step. Keep in mind that regeneration does not work against effects that say 'sacrifice' or effects that reduce toughness to 0 or less, such as -1/-1 counters.

Interaction examples

Protecting the Sleeper Agent

Xantcha, Sleeper Agent

If your opponent attempts to use a destruction spell on Xantcha, Sleeper Agent, you can activate the Vanguard ability. Even though your opponent controls the creature, you still own it and can target it. You sacrifice another permanent you control, like a land, to grant Xantcha, Sleeper Agent a regeneration shield, keeping her on the board so you can continue to draw cards from her ability.

Trading Utility for Survival

Sol Ring

If an opponent plays a board wipe and you have a vital creature you must save, you can sacrifice your Sol Ring to Xantcha's ability. By sacrificing the artifact, you ensure your creature survives the destruction effect. The Sol Ring goes to the graveyard, and your creature stays on the battlefield tapped.

Resource Management with Command Tower

Command Tower

In a late-game scenario where you have excess mana, you can sacrifice a Command Tower to Xantcha to protect a key attacker. Because the Vanguard ability has no mana cost and no 'once per turn' restriction, you can sacrifice multiple permanents in a row to protect multiple creatures or the same creature multiple times if it faces multiple destruction effects.