MTG Combo: Primordial Hydra + Scrounging Bandar
Play Scrounging Bandar and Primordial Hydra to the battlefield. At the start of upkeep, take priority to resolve Scrounging Bandar's ability first, then Primordial Hydra's. eg. A Primordial Hydra with 1 counter would be given 2 counters from Scrounging Bandar, then the Hydra would have three counters which would double to 6.