They arent great when youre behind, dont help you catch up particularly well, and are worse in control mirrors
Both of these cards are strong on their own, but if you attack with both of them at the same time they meld to become a 9/9 with some very silly effects
If youre brewing in Standard or Pioneer, its one you should consider
(At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) When this land enters, sacrifice a land
These days it sometimes sees some fringe sideboard play in Eternal formats, but other than that its just collectability
For replacement cards, these are the weakest cards in the deck that can be substituted out if you're trying to make cuts for stronger cards