You draw a card in your upkeep
If most of your deck is Phyrexians, however, theyre great to have on your side
If Path of Ancestry's last ability produces two mana (most likely due to Mana Reflection), spending those two mana to cast creature spells that share a creature type with your commander will cause two abilities to trigger
Rise from the Tides: should be fun in a casual blue/black Zombie deck
You get to pick your choice of either giving a creature you control flying, vigilance, or lifelink for a turn, depending on your needs
Just two sets earlier, we had the concept of a creature with an enters-the-battlefield trigger hit the collective Magic consciousness, and it was like a design-bomb just blew up players minds