The Sims 3: avoid dying (infinite life)
.... or learning to resurrect, which is the same thing.
Here is a secret method offered by Resources4Gaming to take cover after your Sim's untimely death.
Go to the Pleasant Rest Cemetery. Near the door is a shrub called "Death Flower Bush". Once you have collected her flower, place it in your Sim's inventory. If you die, the Sim will give the flower to the Grim Reaper to resurrect. Although the flower will not reappear there again, if your Sim is Level 7 in gardening, it is possible to plant the "unknown special seeds" found in the graveyard (but also somewhere else) that have a chance to grow as a Flower. of death.
Note: Having the "Green Thumb" feature can help you in trying to regrow the plant.