You'll never raise a minion. Basically all teams equip putrid Explosion for tombs, since it has a 1 second casting time you will be hard pressed to get a 3 second spell off before the opponent can explode the corpse. Blood well is similarly useless in PvP.
Ok, let me correct myself then: You'll never raise a minion against a decent team. You may well get 10 minions up, but if you do it's versus a team you were going to beat anyway.