Crocodiles are a creature type with a relatively small card pool and little dedicated typal support, making Crocodile decks more of a theme-driven exercise than a heavily supported archetype. Individual Crocodiles span several colors and mechanics.
Leatherhead, Swamp Stalker brings Crocodiles a threat, entering as a 5/4 with trample and a hexproof counter that can later be spent to destroy an artifact or enchantment after dealing combat damage. Ammit Eternal supplies another imposing option as a 5/5 with afflict 3 that can shed its accumulated -1/-1 counters whenever it hits a player.