Brilliant idea to encourage buying wards
Remove revive. When you die, your summoner spells are both replaced with revive for the duration of your death. pressing either one will trigger it. But revive now has a new ability:
Revive: Spend 50% of your current gold to reduce your current death timer by 50%.
This encourages you to get back into the fight, but you will want to spend as much gold in the shop itself as you can, and attempt to fill it up with wards, hopefully.