Even if one of the lands you sacrifice is both a Swamp and a Forest, you have to sacrifice another land that is a Swamp or a Forest
Additionally, if your opponent has a heavily damaged Pokemon on the Bench, you can bring it forward for an easy Prize Card
While Martyr + [casthaven]Proclamation of Rebirth[/casthaven] is the engine to a more controlling build of Soul Sisters, here it is sacrifice this to turn on [casthaven]Serra Ascendant[/casthaven] or make target burn player cry. Its the most all-in card in this list and while it does synergize well with multiple cards in the deck, its the first thing I would cut if there were no budget considerations
There are countless cards that let you trade life for other resources, and Bolass Citadel is one of the most (in)famous
and 2 "East Blue" type characters to set Kuro as active and rest one of your opponent's characters that costs 5 or less
BPhillipYork: Flashback effectively being pasted onto all your spells is really solid