Titanfall

as soon as you use this spell and touch yourself or someone or something (because it will pelage loyalty to the thing you touch) a giant automaton will fall from the sky 

when you get in Str, Dex and Con will instantly become 20 and plus 5 for all rolls (except damage} and damage will be doubled but all smaller weapons will become unusable 

only can be used once every long rest

adds 100hp to you, if you lose the 100 it will explode you must make Dex save to get out of the mech if you fail you lose half your health