1 Tuner + 1 or more non-Tuner monsters This card gains 100 ATK for each of your opponent's banished cards. During the Standby Phase of the next turn after this card was banished: Special Summon this banished card. You can only use the effect of "Angel of Zera" once per turn.
Eccentric Boy lets you Synchro Summon using materials from your hand. but monster summoned with him as material are banished when they leave the field. In Angel of Zera case however this is a free revival.
Have Retaliating “C” on the field to make sure Angel of Zera is banished when he is destroyed or sent to the graveyard. If Angel of Zera does end up in your graveyard you can banish him with cards like Freed the Brave Wanderer or Soul Release so that he will be revived.
As for decks built around it... The only banish-heavy deck around (Metaphys) can't really banish it effectively. Cards like Different Dimension Ground and Freed the Brave Wanderer are probably the best you could go for.
To anybody wondering what you could use Diana the Light Spirit for... This is a good example.