Promo edition hasn't being used lately in splinterlands.com. Some Promo cards are as amazing as they've ever been, though, so let's revise some of them for how powerful they are - maybe you'll want to rent a few before your next tournament session.
The first and most powerful promo card I can think of is Lord of Fire. This Legendary sets the Fire Splinter apart, because it covers all of its weaknesses. Fire Splinter doesn't work well against high armor teams with repair, high magic damage and heals. Low mana Fire monsters are fragile.
Everything is solved with Lord of Fire. Strengthen boosts everyone's HP, silence lets you worry a lot less about magic attacks, affliction ignores heals and then you even have shatter, instantly breaking through enemy tanks' armor.
Corrupted pegasus is the primary reason Death Splinter is incredible in tournaments. Just look at him: tank heal! Something so rare among Death monsters is granted in the form of a kickass horse that'll also boost everyone's HP. You can see strengthen is a really good ability on a card that synergizes well with it.
Good old Dwarven Wizard. Fire and forget. Every team needs magic damage, even if it's just 1 magic attack endlessly stunning enemy snipers and whatever else is on their backline. Highly cost-efficient, Dwarven Wizard is the one card you can use to delay your opponent's strategy as if they were never allowed to have one in the first place.
