This means that anything that transforms into an eldrazi is off the list, mainly for simplicity reasons
You can pay two mana to exile it as you would with the mechanic, and then cast it on a later turn for two mana less than it would normally cost
They have a purpose and their power level is proportioned to the theme their deck is built around
This has created an incredibly busy, and confusing, time within the MTG content calendar

1 Wildcard of any rarity A common (18%), uncommon (58%), rare (19%), or mythic rare (2%) card from the Lorwyn Eclipsed main set An uncommon (2%), rare (less than 1%), or mythic rare (less than 1%) fable frame card A rare (1%) or mythic rare (less than 1%) borderless nonland card A borderless reversible shock land (less than 1%) 1 Rare or mythic rare A rare (78.2%) or mythic rare (13.6%) card from the Lorwyn Eclipsed main set A rare (4.6%) or mythic rare (1.2%) fable frame card A rare (less than 1%) or mythic rare (less than 1%) borderless nonland card A borderless reversible shock land (less than 1%) 1 Traditional foil card of any rarity A common (60.4%), uncommon (29.8%), rare (6.5%), or mythic rare (1.1%) card from the Lorwyn Eclipsed main set An uncommon (1%), rare (1%), or mythic rare (less than 1%) fable frame card A rare (less than 1%) or mythic rare (less than 1%) borderless nonland card A borderless reversible shock land (less than 1%) 1 Basic land A non-foil (40%) or traditional foil (10%) default frame basic land A non-foil (40%) or traditional foil (10%) full-art basic land 1 Non-foil helper card or double-sided token Note: Percentages may not sum to 100 due to rounding

Jarad is a graveyard commander all the way which means youre going to be leaning pretty heavily into a sacrifice theme to take advantage of its abilities