mtg gift a card bloomburrow some packs also contain an Art card showcasing a piece of art from the Bloomburrow set Coiling Rebirth

All colors and even lands use the sacrifice keyword action

Good start to the Top Five

Ajani Unyielding Ajani, Mentor of Heroes Ajani, Sleeper Agent Ajani, Valiant Protector Anthem of Champions Aragorn and Arwen, Wed Arahbo, Roar of the World Armada Wurm Arwen, Mortal Queen Black Panther, Wakandan King Brightglass Gearhulk Byrke, Long Ear of the Law Calix, Destiny's Hand Calix, Guided by Fate Captain Sisay Captain Sisay Dr

Fetch lands Fetch lands ([c]Polluted Delta[/c], [c]Bloodstained Mire[/c], [c]Flooded Strand[/c]): Fetch lands work great in conjunction with dual lands because they can fetch the dual land of your choice directly from your library