Thalia's Geistcaller
Creature — Human Cleric
Lifelink
Whenever you cast a spell from your graveyard, create a 1/1 white Spirit creature token with flying.
Sacrifice a Spirit: This creature gains indestructible until end of turn.
Sean Sevestre
Commander 2019 (C19)
• #7Rulings
The triggered ability of Thalia's Geistcaller will resolve before the spell that caused it to trigger but after targets have been chosen for that spell. It resolves even if that spell is countered.
(wotc • 2019-08-23)
You can sacrifice any Spirit you control to activate the last ability of Thalia's Geistcaller, not just a Spirit token it created.
(wotc • 2019-08-23)
Rulings
The triggered ability of Thalia's Geistcaller will resolve before the spell that caused it to trigger but after targets have been chosen for that spell. It resolves even if that spell is countered.
(wotc • 2019-08-23)
You can sacrifice any Spirit you control to activate the last ability of Thalia's Geistcaller, not just a Spirit token it created.
(wotc • 2019-08-23)