Pillar Analysis: Unique Effect (Mana Combo), Scarcity (Antiquities, Reserved List), Combo Enabler
Loot has an upkeep trigger to exile can cast that turn cards from your library equal all nonland card types I control, but not themself
Several factors influence Team Rocket card values: card condition (mint cards worth 3-5x more), rarity (holographic and rare cards command higher prices), first edition status, PSA/BGS grading scores, and market demand for specific Pokemon
Of course, the floor on Bitterbloom Bearer is lower than Bitterblossom simply because its vulnerable to traditional removal spells
You might be aware of some of the more infamous pieces, like Brainstorm
Arixmethes's effect causing it to be a land overwrites any earlier effects that gave it additional types