This card is a bit narrow but in the decks where it's fun, it's a lot of fun and I'm going to at least try it out
Doran, the Siege Tower was the de facto leader before, but he is better suited leading Treefolk Tribal since he only enables Defenders to deal damage with their toughness, not attack or (most importantly) draw cards
Neo Kaiser Sea Horse is a Level 4 Tuner that gives you instant access to the tools you need, by Special Summoning itself from your hand, and adjusting the Level of any Tuner (even itself!) by +/- 1. This gives you maximum flexibility for whatever's the best monster to Synchro Summon
5 Yidris, Maelstrom Wielder Similar to Abaddon the Despoiler, Yidris, Maelstrom Wielder grants all spells in your hand cascade, so long as he has dealt combat damage to an opponent
Then Skirk Fire Marshal and Goblin War Strike are game enders just waiting for your goblin count to creep high enough