You usually have to spend atleast $1 on your card to activate the automatic discount, but you'll end up saving far more
This gives you a lot more control over the course of other players turns than you may normally have and is a great card to use in conjunction with threaten effects (that's to say, cards that let you steal your opponent's cards until end of turn) like Act of Treason
Lantern is an option, but I'm not sure if it's a great one (-1 shroud isn't great, and Yorick is well set up for dealing damage)
4 Descent Into Avernus Everyone Is Going Down A surprisingly powerful option for your deck could be the Battle for Baldurs Gate enchantment, Descent into Avernus
The most famous example of the use of this card allowed exactly like that: Yugi uses this card in his 1st duel with Kaiba to prevent 2 of Kaibas Blue Eyes White Dragons from attacking as well as drawing the last few pieces needed to summon Exodia
#17 i cant say anything about Canada, but my walmart hasnt stalked much of anything this month