You always roll two dice: a number die (1,2,3,4 + two permanently blank faces) and an element die (never blank).
The number die's four value faces are your four slots. Inscribe a card onto a face; first inscription each turn is free, each further one costs 1 energy.
Each turn: gain energy (2 + faces cleared last turn), draw 1, inscribe, optionally TILT (1 energy: change one face of the element die for this turn), roll, optionally reroll (2 then 4), then resolve.
Resolution: the element verb resolves first, then the landed face fires its card. A blank or empty face fires nothing — but the element verb still edits the die, so no turn is wasted.
Kill the Sentinel (70 HP) before it kills you (50 HP).