It feels weird that there doesn't seem to be an option to target the minion you summon with the "When you summon a minion:" trigger.
Out of curiosity, what are you trying to target the minion you summon with? Depending on what you're trying to go for, creating an effect that gives effects to minions in your hand might be what you want.
Something like "When you summon a minion: Give it +1/+1."?
I will work on that. :)
