Osiris, Aegis Usurper

Double strike, Riot

When Osiris, Aegis Usurper enters the battlefield it attacks Magnus, Aegis King if it
is also on the battlefield. If Magnus,
Aegis King dies then Osiris, Aegis Usurper
gains +1/+1 counters equal to the amount of
time counters left on Magnus, Aegis King.