Of the two-color lands that are a prominent feature of Magic Duels, I think my favorite is Highland Lake, by Florian de Gesincourt
A 3/4 with double strike that becomes hexproof whenever it attacks can also close games quickly - expect to see plenty of The Wandering Rescuer if there are enough small White creatures to build around
Suddenly, you nuke the wounded for 120 apiece
More Magic: The Gathering Keyword Articles How to Build an MTG Deck How to Build a Commander Deck in MTG MTG Evergreen Keywords List MTG Counter MTG Counters (markers) MTG Deathtouch MTG Defender MTG Double Strike MTG Enchant MTG Equip MTG Fear MTG Fight MTG First Strike MTG Flash MTG Flying MTG Hexproof MTG Indestructible MTG Intimidate MTG Lifelink MTG Menace MTG Protection MTG Prowess MTG Reach MTG Regenerate MTG Sacrifice MTG Shroud MTG Tap and Untap MTG Trample MTG Vigilance MTG Ward
Also, this card is able to transform into a Gruul-colored Blightsteel Colossus on its flipside as long as you pay 10 mana or nine mana and two life, so that might act as the trump card Etali, Primal Storm is stuck as a six-mana 6/6 with no keywords
Given that Cogsworth Grandfather Clock also has Ward, which prevents it from being targeted, its possible to get Cogsworth Grandfather Clock out early and keep him play for a while to give your other cards a powerful buff