I have a M T G Lands I presume promo pack 4 or 5 cards think i got it about 2010
It is shrink wrapped with red cellophane or similar
I can discern add to your mana pool on last card in pack
Any info on what it actually is appreciated

Sealed land packs usually came with theme decks. A theme deck was a pre-constructed set of card that you could open and start playing Magic:The Gathering right then and there. You usually got the theme deck, a pack or two of unopened cards and a set of land (what you have) so you could have some variety with the theme deck you just purchased.

Thanks for the info
I only have the sealed pack of lands cards
Nothing else if I remember it was described as a promo set that is why I have it
It was not expensive
I purchased it from a Australian dealer way back