You create Thopters and gain life all while Deploy is resolving. Nothing can happen between the two, and no player may choose to take actions.
25-01-2019
wotc
If the target creature is an illegal target by the time Depose tries to resolve, the spell doesn’t resolve. You don’t draw a card. If the target is legal but not tapped (most likely because it was already tapped), you do draw a card.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.