As a key member of the team that created Jumpstart , I feel it is an excellent playtesting tool
Ballynock Trapper The steep 4 mana is more than Id want to pay for a typical tapper, but Ballynock Trapper doesnt require additional mana to activate its ability, and this soldier can get multiple creatures in one turn to enable aggressive strategies
When the conditions for Melding are met, Bruna and Gisela combine to form the monstrous Brisela, Voice of Nightmares
Finally, because he can make many spells and abilities free, he can be the third card in numerous infinite combos, like Carrion Feeder and Gravecrawler, Necrotic Ooze with Asmodeus, the Archfiend in your graveyard, or even just K'rrik and Blood Celebrant, which essentially makes a free mana of any one color for each three life you pay