The second ability costs X, and it lets you Destroy each nonland permanent with converted mana cost X whose controller was dealt combat damage by Steel Hellkite in that turn
Jace can also get targeted by what your opponents doing, drastically reducing the value it creates
Best MTG New Capenna cards Lord Xander, the Collector Arcane Bombardment Fleetfoot Dancer Giada, Font of Hope Even the Score Luxior, Giada's Gift Ognis, The Dragon's Lash Brokers Ascendancy Gala Greeters Tri-lands cycle Weve technically chosen fourteen cards in our list of the ten best cards in New Capenna - but, in our defence, crime is all about breaking rules
Since it has flash, you can cast Misleading Signpost at any timebut doing so during the declare attackers step lets you get away with some shenanigans to throw your opponents off balance
Sometimes I even play with them