Avenger of Zendikar is far weaker in this role as you have few lands early when it is best to cheat big things in, the plants don't fly nor can you pump them up to being relevant without the Avenger itself in play.Basically, if you want lots of things, if you don't want to die to attacks, play this
The Quick Search ability allows you to search your deck for a card to put straight into your hand once a turn
When Garruk Relentless transforms into Garruk, the Veil-Cursed, he remains the same object, so there's no reason to believe anything happens to his loyalty counters
This special Hisuian Zoroark is a special Promo card handed out during the Lost Origins era of the game
If a card becomes a copy of Me, counters will remain on that card as the copy leaves the battlefield (unless it goes to your hand or library)
For example, during a Time Spiral Remastered Limited event, you cant add Relentless Rats from your personal collection