Time Slows Down

Flash. As an additional cost to cast Time Dilation, pay half your current life total. If enchanted instant resolves, exile that instant and Time Dilation.
At the start of your next upkeep, enchanted instant comes into play tapped and enchanted by Time Dilation for {x} turns. Enchanted instant's rules begins with: {x}{t}
Exile the instant and Time Dilation before your upkeep after {x} turns.