Cheapest priced copy (Innistrad Remastered): $2.49 at Card Kingdom, near mint, their price list as of .
Sigarda, Host of Herons 
Legendary Creature — Angel · 5/5 · Mythic · Avacyn Restored · #210
Flying, hexproof
Spells and abilities your opponents control can't cause you to sacrifice permanents.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
6 printings · $2.49 to $24.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avacyn Restored | 210 | Mythic | $3.49 | $22.99 |
| Innistrad Remastered | 247 | Mythic | $2.99 | $3.99 |
| Innistrad Remastered | 434 | Mythic | $2.49 | $2.99 |
| Open the Helvault | 210 | Mythic | — | — |
| Ultimate Box Topper | U25 | Mythic | — | $24.99Out of stock |
| Ultimate Masters | 206 | Mythic | $3.49 | $5.99 |
3 rulings from Wizards of the Coast
- 7 December 2018As 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.
- 7 December 2018Sigarda'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.
- 7 December 2018If 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.