Return it to the battlefield under your control at the beginning of the next end step
Other options may not exactly combo with themselves, but the other combo pieces needed are so generic that it might as well be a 1-card combo
High Noon A stax piece that shuts down some of the most powerful strategies in Magic: The Gathering like MTG Cascade or Storm, High Noon is going to be super infuriating to face off against
Aside from that, look for cards that payoff the abilities of your specific Ajani, whether its lifegain payoffs, token payoffs, or +1/+1 counter payoffs
Despite all that, its a really strong and viable card for any last-ditch efforts
In Constructed it reads 'deals 2 damage to target creature and/or player.' Built to Smash: great Red Deck Wins buffer