Never bad but rarely good, [card]Eternal Dragon[/card] is at its best when its covering up the fact that youre running too few lands
However, with a Fog of Gnats or a Will-o-the-Wisp, or some creature control with Icy Manipulator/Royal Assassin, you may be able to hold off the onslaught of four players beating down on you Either way, good luck
Avatar Kuruk starts out as a Saga before transforming into a creature with a wild ability, and Badgermole Cub is equal parts adorable and powerful
This is a great flicker spell from Theros: Beyond Death that gives you a little more flexibility in whatever you need to flicker at a moment's notice
Lets be honest: having to care about nonland mana sources is not a meaningful restriction
Note that you don't have to exile to get a counter, it still happens with no graveyards