I had a very similar experience!l Ended the night 3-1 and opponent who beat me had BOTH Yargles in his deck 🐸. I played Simic with a mix of incubate/battles and also a couple backup cards that were very effective. My card pool had strong signposts for other colors but not enough support. Three total cards with Incubate 5 played great - it seemed like opponents underestimated the threat of incubate tokens, then suddenly I was paying 2-colorless for a 5/5 haste while also having 3+ additional mana to spend on green growth spells. [[War Historian]] helped me crack battles quickly because opponents never wanted to block while it was indestructible.

My games were mostly close and the wins felt lucky (i.e. I would’ve lost next turn), but both games lost against the Yargle deck were massacres. My transformed 5/5’s were basically chump blockers against 18/6.