whenever you exile a card mtg Flamekin Herald [Commander Legends] Haste Whenever you cast an instant or sorcery spell MTGNexus - Tentis, Molten Dragon

Even without the Adventure, Shrouded Shepherd would definitely be playable too, so this is another one of these where the total package is incredibly impressive As with most of these, if you take the adventure away, were talking about a playable card

Slivers are arguably the most beloved tribe

Primal PrayersPrimal Prayers 16

The former of which is usually the popular choice

Without haste, it's a little vulnerable for one turn while the summoning sickness passes, but if your opponent doesn't have a response, it's a brilliant card to have in your deck

Tap/Untap Shenanigans Instead of tapping our creatures to attack, we can tap them to activate abilities