Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.49 at Card Kingdom, near mint, their price list as of .
Jon Irenicus, Shattered One 
Legendary Creature — Elf Wizard · 3/3 · Rare · Commander Legends: Battle for Baldur's Gate · #425
At the beginning of your end step, target opponent gains control of up to one target creature you control. Put two +1/+1 counters on it and tap it. It's goaded for the rest of the game and it gains "This creature can't be sacrificed." (It attacks each combat if able and attacks a player other than you if able.)
Whenever a creature you own but don't control attacks, you draw a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 278 | Rare | $0.49 | $0.79 |
| Commander Legends: Battle for Baldur's Gate | 425 | Rare | $0.49 | $0.99 |
| Commander Legends: Battle for Baldur's Gate | 536 | Rare | — | — |
| Battle for Baldur's Gate Promos | 278s | Rare | — | $1.49 |
2 rulings from Wizards of the Coast
- 10 June 2022When Jon Irenicus's first ability resolves, the opponent will gain control of a creature and that creature will immediately gain “This creature can't be sacrificed” as part of the resolution of the ability. There is no window of opportunity for that player to sacrifice that creature before it gains the ability.
- 10 June 2022A token's owner is the player who created it.