Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
Creatures your opponents control without flying or reach can't block creatures with power 2 or less.
Partner (You can have two commanders if both have partner.)
11/8/2016 Sidar Kondo’s blocking restriction applies to creatures your opponents control even when an opponent is attacking a player other than you.
11/8/2016 Once an attacking creature has been blocked by a creature without flying or reach, reducing its power to 2 or less won’t change or undo that block.