If Sauron, the Necromancer leaves the battlefield before the delayed triggered ability resolves, that ability will exile the token, even if Sauron, the Necromancer later returns to the battlefield or you control another copy of Sauron, the Necromancer as your Ring-bearer.
Esper Sentinel overshot a bit
$0.19 Pyrrhic Strike Similar effect As an additional cost to cast this spell, you may blight 2
You may choose new targets for the copies.) P/T Set Number 212 Language Espaol Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (3/20/2026) The copies of instant and sorcery spells you cast created by the storm ability are put directly onto the stack
However, theyre also known to push the boundaries of power level on cards from time to time, which sometimes leads to cards being banned in Standard