The trigger event doesn't have to specifically refer to "creatures." In these cases, the trigger event may also refer to something being "put into a graveyard from the battlefield." For example, an ability that triggers "whenever an artifact is put into a graveyard from the battlefield" would trigger twice if an artifact creature dies while Drivnod, Carnage Dominus is on the battlefield
Even outside of that, Heralds Horn is a fantastic reprint for any typal deck
SIRs replaced the older Alternate Art (Alt Art) category from the Sword & Shield era
Usually you are wanting to hit dorks with your bounce, certainly it vastly reduces the utility of the card having only creatures as potential targets but it doesn't much affect the power
5-cost Tashigi is the strongest play in the mid-game, allowing you to shift the game in your favor
I love when artists use these opportunities to paint family portraits or other artists into the game but in a cohesive and thematic way