Loki, Faithful Friend

Empower (Whenever this creature attacks with two
or more other creatures, put a +1/+1 counter on it. It
becomes empowered for the rest of the game if it is not
already empowered.)
At the beginning of your end step, if you control
a creature named Bandit, Fearless Fighter, both
Loki and Bandit become empowered for the rest
of the game if they are not already empowered.
Loki and Bandit have indestructible as long as
they are empowered.