You can special summon Fenrir usings Birth's effect and now search for a Kashtira monster using Fenrir's effect.
A very simple combo that you can do is special summon Unicorn, search the Birth, special summon rise-heart and send Fenrir for cost using rise-heart's effect. Since we don't have cards like Kashtiratheosis and Kashtira Scareclaw, the power level is still not that great in MasterDuel. In the TCG you can resolve Pot of Prosperity TWICE and still win games with a 3 card extra deck, the engine is that powerful. The Kashtira engine is basically a toolbox, big beaters that put a lot of pressure before you even get into the swiss army knife of the extra deck. I will explain each engine seperately and then explain a combo using both engines together. You would have to have knowledge of each engine individually as you will end up winning games using just one of the engines and never seeing any cards from other engine. The concept of this deck is that it features 2 engines that are very strong on their own and search through main deck quickly to get to your handtraps. This definetly not the best way to play Kashtira or Buster Blader but it's definetly versitile and difficult to deal with together.
