These firstwave cards lack the later circle/diamond/star markers in the bottomright corner and often show early printing quirks and errors (notably Venusaur, Charizard, Raichu, Gastly)
Both Bruna and Gisela are powerful cards on their own, one a beefy attacker, the other a top-end threat with a reanimate trigger on it
The top three spots all belong to variants of the same Base Set card, which demonstrates just how much the 1st Edition stamp, print run scarcity, and vintage provenance matter in the highest tiers of the hobby
Two mana for that effect is really good
However, Sultai Arisen is unique as it's less about reanimating creatures from your graveyard and instead more about simply having cards leave the graveyard
The most common effect you will be trying to achieve is causing your opponent(s) to lose a life and for you to gain a life