The downside is negligible in almost every scenario
While its true Omen Hawker has summoning sickness and can only generate mana to be used to activate abilities, there are plenty of ways to capitalize on this
Unfortunately, Modern Horizons 3 was subject to a series of leaks last month, but instead of simply ignoring them, Wizards of the Coast embraced them and discussed the cards revealed in full to help provide players with some additional context for what to expect
Dubbed "White Lightning" (due to its newfound similarity to Ball Lightning), Waylay was issued quick errata that allowed it to be cast only during the combat phase
He provides free value from the command zone and lets you build an army faster than almost any other deck in the format
On the subject of Foretell, Dream Devourer is a card that might just show the mechanic is a mistake