Let's get right to it
So, to some extent, Koth is an incentive to go Mono-Red or close to it, and if you can do that, obviously the -3 will kill most stuff, but on a board that is built out at all, your opponent can still easily deal with Koth This will be able to attack with higher power a decent chunk of the time for sure, but the times where it is just a lowly 2/3 will feel pretty rough
Dungeon Payoff Cards Gloom Stalker isnt the best payoff card for completing a Dungeon and in most cases, I would stay away from it
That means were leaving out creatures like Arno Dorian, a human that only boosts assassins, as well as Sanctuary Lockdown, a human anthem on an enchantment
For me the safest way is to check the mana symbols if a card has any
It kills most creatures played in the first few turns and snags Signets, Talismans, and other early artifacts