You can swat Great Intelligence's Plan (and choose another target opponent), and you can Swat This Is How It Ends (and target another creature)
The +1 is embarrassingly weak protection against three separate opponents, and the -9 isnt even a guaranteed mill victory like it usually would be in a 1v1 match
Their deck of cards is their spellbook, with which creatures are summoned to battle each other and attack the opponent with
To further demonstrate my point, lets look at a sample pack and break it down to see exactly what I can do with these cards, aside from using them as bike spoke decorations and noise makers (does anyone even do this anymore because if so, you need to send me pictures)
I always say lifegain decks need strong payoffs to turn their Soul Wardens and stuff into win conditions
Seasoned planeswalkers, this is your playground to refine, experiment, and discover new heights of strategic gameplay