Taking a turn
Each turn has 3 distinct phases. Upkeep, Main Phase, End of Turn.
During the Upkeep step your available lava is set to the maximum available this turn. You then draw cards, and status effects wear off if applicable.
During the Main Phase you can play cards and attack with creatures, you can do this in any order you like, the main phase lasts for 60 seconds, but you can choose to end your turn early.
You may attack any creature you choose, or the enemy hero directly unless prevented from doing so by the effects of a card.
End of Turn cancels any active spells if you haven’t selected a target, and applies any DoT (Damage over Time) effects where applicable.