Rat Ronald (Real)

Watch My Stuff Or Go To Hell — At the
beginning of each opponent's upkeep, that player
may choose a nonland permanent they control.
If they do, you gain control of that permanent. If
they don't, that player loses 10 life.
The Rat Trap — Creatures can't attack you
unless their controller sacrifices a creature or
discards a card for each creature they control
that's attacking you.