If you controlled a Dinosaur when you declared Burning Sun Cavalry as an attacker or blocker, it doesn't matter whether you still control one as its ability resolves
Dark Blade + "Pitch-Dark Dragon" Each time this card inflicts Battle Damage to your opponent, you can select up to 3 Monster Cards from your opponent's Graveyard and remove them from play.
Token copies still have a mana cost, so a curve like Woe Strider into Nightmare Shepherd into Gary drains for 10 immediately, and the 4/4 flyer could help finish the game off
First, if someone says they're going to have Lutri be their companion, it's the easiest thing to fix: you just say, "Hey, did you know you can't do that?" and it likely changes what their deck is doing very little
In particular, the latter has the worst compatibility with erosion infection, which can avoid card accidents, In a situation where the positions of the compatible ones are reversed
So that's enough talk