Invasion of Shandalar

Battle — Siege

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When this Siege enters, return up to three target permanent cards from your graveyard to your hand.

Leyline Surge

Enchantment

At the beginning of your upkeep, you may put a permanent card from your hand onto the battlefield.