Manticore

 is a unit.

Strategy
If in order to buy Manticore you must first go out of your way to buy a Steelsplitter, it is almost certainly not worth it. Instead you should just go for a different attacker - even Tarsier would be a better choice. However, is quite efficient when you already have a Steelsplitter lying around, especially if you bought the Steelsplitter as you first attacker to avoid wasting blue but it is now being absorbed. Manticore in this situation can use its ability to gain you instead of just running into a Wall. This makes it useful in games featuring heavy-blue legendaries such as Defense Grid or Apollo, as buying these units when few other blue units are available will often leave you forced to rely on Steelsplitters for a large part of your attack. It's especially useful in Apollo games because it's also a counter to Apollo - it can't be sniped due to its, and the Steelsplitter you have to buy first can't be sniped either while it's under construction.

Manticore has great synergy with Odin, as not only is Odin a heavy-blue legendary but it also comes with three Steelsplitters (albeit remember to keep at least one Steelsplitter around to maintain the threat of clicking Odin). It also has great synergy with Steelforge, which can spend large amounts of blue resource to convert Drones into Steelsplitters.

Finally, due to its fairly high health, Manticore can be used effectively in gambits since you can allow a breach for up to 3 without suffering any serious damage.