New here.. Issues with mana cost to ability triggers.

Hello all! Super new to MSE, but wish I'd known about it sooner. Thanks to those of you who put in the effort to make this a reality!

I'm trying to make a creature card that grants Landwalk abilities based on the lands tapped in payment for initial casting cost. How would I type that out in the textbox? I've tried a couple of different ways and the editor translates it into something entirely different. 

Say for instance, the casting cost was  and if they tapped a swamp to pay for the cost, the creature would receive Swampwalk, and if they tapped a Forest to pay the cost, Forestwalk. 

I had it something like " When ~ comes into play, it gains Landwalk of each land type tapped to pay for its casting cost." And a couple of other similar worded phrases that got translated into something other than the desired result.

Better yet would be an ability that covered this, say NaturalWalk (This creature has Landwalk of any and all land types tapped to pay for its casting cost.)

Is there a specific guide on here that could help me with this type of ability creation and related syntax, because I'm not seeing it. Any guidance with this would be appreciated.

Thanks!