Forum:Gladiator Beat War Chariot Ruling???

Senario: Opponent has laquari and a face down (War Chariot). I have Thunder king Rai-Oh and mystic tomatoe under skill drain. Laquari kills mystic tomatoe and tags out. Can Rai-oh negate the summon of the newly summonned glad, if so can war chariot be played since the only glad on the field is having its summon negated so would it actually be on the field for war chariot to negate Rai-oh???? I hope I confused someone...