Boggart Arsonists is the only Modern creature with plainswalk.
Of course, if you meant planeswalkers, then that's more doable. It would help if you provided some information on what the deck seems to struggle to do or what the focus is. The more you can tell people, the more focused the suggestions you'll get and the better your deck will become.
December 2, 2015 9:54 p.m.
ok. sry. i meant plainswalkers. if you clicked the link...
December 2, 2015 10:02 p.m.
I did click the link.
Note that things like Elspeth, Knight-Errant are planeswalkers, as indicated by their type line.