As a land, Urzas Saga can be played for no mana and functions as a colorless mana source for the first two turns
3on3 1st 1x 2x 4x 4x 1x 4x 2x 3x 4x 4x 4x 1x 3x 1x 3x 3x 2x 1x 4x Deck Stats On Curve Plays Counter Stats Avg: 0.72k / card 2k: 10 1k: 16 Searcher Hit Chance 97.1% Cost Curve Power Curve Types Dressrosa: 42 Straw Hat Crew: 8 Barto Club: 4 Yonta Maria Fleet: 4 Supernovas: 4 The Seven Warlords of the Sea: 3 Thriller Bark Pirates: 3 CP9: 3 Navy: 2 Revolutionary Army: 1 Attributes Keyword Stats On Play 24 Activate: Main 12 Blocker 9 Main 6 Trigger 6
I also really like this leading a Pinger deck where you tap a Prodigal Pyromancer to shoot your team for a damage, and make sure you are running things that will take the damage into good stuff like Stuffy Doll, Brash Taunter, and the enraging Dinosaurs Bellowing Aegisaur and Sun-Crowned Hunters

Advanced Search Sets Random Syntax Adaptive Automaton An Unexpected Party An-Zerrin Ruins And They Shall Know No Fear Arcane Adaptation Banner of Kinship Bloodline Bidding Brass Herald Caller of the Hunt Celestial Reunion Chronicle of Victory Collective Inferno Conspiracy Cover of Darkness Crippling Fear Door of Destinies Engineered Plague Etchings of the Chosen Icon of Ancestry Instruments of War Kindred Dominance Kindred Summons Leyline of Transformation Lifecraft Engine Mirror Entity Avatar Morophon, the Boundless Obelisk of Urd Oko, Shadowmoor Scion Pact of the Serpent Patchwork Banner Plague Engineer Radiant Destiny Raise the Palisade Raise the Palisade Rally the Ranks Renewed Solidarity Riders of Gavony Rukarumel, Biologist Season of Gathering Seshiro the Anointed Avatar Shared Triumph Steely Resolve Storage Matrix Three Tree City Turnabout Vanquisher's Banner

If you feel comfortable with Starter Deck Duel, and have earned a few rare wildcards this list won't be too taxing to craft, and will give you a good way to safely tap creatures on your way to winning some games