Sigarda, Host of Herons

Bracket

• B1 Exhibition — allowed: No restriction at this bracket
• B2 Core — allowed: No restriction at this bracket
• B3 Upgraded — allowed: No restriction at this bracket
• B4 Optimized — allowed: No restriction beyond the banned list
• B5 cEDH — allowed: No restriction beyond the banned list

Why

• No Game Changer, mass land denial, extra turn, tutor or two-card combo

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

No known combos for this card.

Combos: Commander Spellbook

Rulings

• 2018-12-07 · Wizards of the Coast
  As a spell or ability an opponent controls resolves, if it would force you to sacrifice a permanent, you just don't. That part of the effect does nothing. If that spell or ability gives you the option to sacrifice a permanent (as Desecration Demon does), you can't take that option.
• 2018-12-07 · Wizards of the Coast
  Sigarda's ability affects only sacrifices. It won't stop a creature from dying due to lethal damage or having 0 toughness, and it won't stop a permanent from being put into its owner's graveyard due to the "legend rule." None of these are sacrifices; they're the result of game rules.
• 2018-12-07 · Wizards of the Coast
  If a spell or ability an opponent controls states that something happens unless you sacrifice a permanent (as Mogis, God of Slaughter does), you can't choose to sacrifice a permanent. On the other hand, if a spell or ability an opponent controls instructs you to sacrifice a permanent unless you perform an action (as Killing Wave does), you can choose whether or not to perform the action. If you don't perform the action, nothing happens, since you can't sacrifice any permanents.

Rulings: Scryfall · Wizards of the Coast