You cast the instant or sorcery while Seifer Almasy's last ability is resolving and still on the stack
The Stoneforged Blade isnt bad, per se, but your deck should already have plenty of impactful equipment in it
His Willpower is a modest 4, however, so while this can be good for getting extra Lore near the end of the game, I'm not quite sold that it's a good card to play early on, especially on its own
Brawl Not Legal Vintage Not Legal Timeless Not Legal Commander Not Legal Pauper Not Legal Oathbreaker Not Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Old Fogey: Due to changes in how echo and phasing work since Old Fogey was originally printed, echo mostly does nothing in this case
Whenever you cast a spell, you reveal the card to all players and choose any other card (see below for the cards that you can use) that has that card's mana cost