At the beginning of your upkeep, you may exile Catsima. If you do, it gains "Whenever a land enters the battlefield under your control, if Catsima is exiled, you may put a toy counter on it. If you don't, return Catsima to the battlefield with X +1/+1 counters on it and draw X cards, where X is the number of toy counters on it."
Whenever a Vehicle you control deals combat damage to a player, that player exiles that many cards from the top of their library. You may play lands from among those cards for as long as they remain exiled.