Umezawa's Jitte [From the Vault: Lore] Urza's Tower You may repeat this process

You may repeat this process any number of times

Titania is literally an aspect of the forest itself

Set: Commander 2014 Type: Instant Rarity: Rare Cost: {1}{U} Return target nonland permanent you don't control to its owner's hand

They can't be regenerated

Umezawa's Jitte [From the Vault: Lore] Urza's Tower You may repeat this processSet: From the Vault: Lore Type: Legendary Artifact Equipment Rarity: Mythic Cost: {2} Whenever equipped creature deals combat damage, put two charge counters on Umezawa's Jitte. Remove a charge counter from Umezawa's Jitte: Choose one Equipped creature gets +2 +2 until end of turn. Target creature gets 1 1 until end of turn. You gain 2 life. Equip {2}