Thats not entirely common in Boros, and essentially feels like it would reward the kind of group hug strategy that actually squeezes more draw out of a foe to give it to you
The lands we play with her should get exiled if they go back to the graveyard, but we can respond to the exile trigger, bring the lands back with some of our instant-speed recursion, and we won't have to exile them
and the third is that he triggers off three different card types
The rad counters can trigger the milling, but youre obviously going to want to include a lot of other ways to mill in your deck
Notably, a discovery counter causes the card to go back to the graveyard if it's removed
Sacrifice a Treasure, Clue, or Food for a 1-drop and then sacrifice that 1-drop for a 2-drop, and so on