Regardless of frame, dual lands will appear twice as often as non-dual land rares
We already discussed how gifting a card can give an opponent resources, and this is an especially relevant decision to make when their hand is low on gas and theyre stumbling
However, the last part of the ability will check how much life you've gained as the ability resolves, so if you've only gained 5 life this turn by the time the end step comes around, you could still gain 2 more life while this ability is on the stack in order to return the target creature card to the battlefield instead of your hand
You can play Endrek fairly, by rationing your mana out, or not so fairly, by exploiting cards like Grave Pact
However, the Elves players are definitely making the most use of VojaVoja