Drain Power [Unlimited Edition] Kobold Warrior and it has “{2}{U}{U}: Return

and it has “{2}{U}{U}: Return this creature to its owner's hand at the beginning of the next end step

Set: Secret Lair Drop Series Type: Enchantment Rarity: Rare Cost: {G} At the beginning of each of your main phases

For each even result

Set: Planeshift Type: Instant Rarity: Rare Cost: {G}{W} Search your library for a creature card

they're treated as though they don't exist

Drain Power [Unlimited Edition] Kobold Warrior and it has “{2}{U}{U}: ReturnSet: Unlimited Edition Type: Sorcery Rarity: Rare Cost: {U}{U} Target player activates a mana ability of each land they control. Then that player loses all unspent mana and you add the mana lost this way.