Doubling Season supports green Commander decks that build around tokens, counters, or planeswalkers. Its two replacement effects double tokens you would create and counters an effect would place on a permanent you control, allowing one enchantment to strengthen several parts of the same strategy.
Avenger of Zendikar is a particularly useful partner. Doubling Season increases the number of Plant tokens its entry ability creates, then doubles the +1/+1 counters its landfall ability places on your Plants. Scute Swarm offers another token-focused payoff, with extra copies accelerating its growth once you control enough lands. Neither interaction requires the enchantment to change your deck’s basic game plan.
Planeswalkers show why the counter wording matters. Garruk Wildspeaker normally enters with three loyalty, but Doubling Season makes that six, enough to activate his minus-four ability immediately if you can activate a loyalty ability then. His plus-one activation still adds only one loyalty counter because adding that counter pays a cost rather than coming from an effect.
The enchantment costs five mana and does little by itself on an empty board, so plan for a follow-up that makes the investment worthwhile. It also does not double counters on players, such as experience or poison counters. Parallel Lives overlaps with the token half but lacks the counter benefit; running both makes an applicable token-creation effect produce four times its normal number. Doubling Season fits best when your deck can use both halves or turn one large token or planeswalker play into a meaningful advantage.
Unofficial proxy card for casual play and testing where your group permits it.
