These cards can include any type of Trainer card, such as a Pokmon Tool
It has a kind of reasonable floor as most decks can take advantage of the reanimation, but it is probably not going to be very good in your typical White deck, and like a B in a GW deck that is good at gaining life A 3-mana 0/4 that ventures into the dungeon is probably already a decent card for the format, but this looks to be one of the bigger payoffs for completing dungeons at lower rarities, as it becoming a Flyer is a pretty big deal -- that kind of size almost always matters on an evasive creature, and it is going to give you value when it ETBs no matter what
Though they debuted with only a single card, Sengir Vampire, these creatures of the night have become a well-supported archetype with distinctions between vampires of different planes
Was this the first Secret Lair
Even if these effects are justifiable in other colors, its a complex question, and one I believe misses one of the biggest points: green is powerful because of redundancy
Twinblade Assassins is basically a creature version of Deathreap Ritual, which is heavily played in Golgari sacrifice builds for card drawing fun times