Suppose I have Sarkhan's Unsealing out, and exactly 7 cards in hand (including Tishana), and I cast Tishana, Voice of Thunder. Which mode of Unsealing will trigger?
My reasoning is that when you cast Tishana, you have to put her on the stack first, so she will be a 6/6 when Sarkhan's Unsealing checks her power. But I could see it go either way, so I wanted to get a more definite answer for clarity.
More generally, when precisely does the power get "locked in" for the purpose of determining whether Sarkhan's Unsealing triggers? For example, suppose I crack a bunch of Chromatic Spheres to refill my hand while casting Tishana. What happens then?