Night, Cavalier's Companion

Soulbond, Trample
As long as Night is paired with another creature,
each of them are knights in addition to their
other types.
If Night is a knight and a knight creature you
control has menace, each knight creature you
control have menace. The same is true for
lifelink, first strike, double strike, deathtouch,
trample and vigilance.
When night came, it carried all the horrors of war on
it's back.