Orcus is pricey, but in the right deck, he can do a lot of work, particularly if you opt to fish him out of the graveyard
Chaos: Whenever you roll Chaos, create two 1/1 green Elf warrior creature tokens
I personally have only seen the English Thin print Base Pikachu twice (one is this Yellow Cheeks thin 3D stamp in the picture below), and Ive only seen three other Commons/Uncommons with this Thin print difference
This will tend to matter more for multi-color builds and tribes with big mana costs in multiple colors, so your options ARE narrowed somewhat, but over time more and more options will appear
The unique quality to this mechanic is that one choice, that of drawing a card, is consistent from card to card
"It's a lifeless ruin of some long-lost race