If you're a dragon, you can't be attacked by non-flying creatures
Well, it only triggers one time (when Landfall triggers the second time on a turn) and it doubles counters on only one creature but it doesn't have any costs needed
You could always play Sheoldred to get a similar effect, a big body that snowballs if you untap with it
Overall, MTG Cardsmith is a unique and powerful tool for both hardcore and casual fans of MTG
You may not choose one of the Spider permanents to keep and you may not put any of the Spiders into your graveyard this way
However, blue also gives you plenty of good reasons to tap your artifacts: And then there are the multicoloured cards, mostly blue: It seems to me that while certain groups of cards overlap perfectly, some clash in the most horrible way, precisely in the same colours where they should overlap