You'll choose the target artifact or creature for that second ability at that time
They become a keyword soup legend with an activated ability that moves your lands into the center of the table with chunks of four +1/+1 counters
It featured Mega Evolutions, introduced BREAK cards, and brought back EX mechanics in new forms
It essentially gives each of your bears an enters ability, letting you either grow your creatures with +1/+1 counters or use them as fight spells
More importantly, the creature card has a useful ability in that whenever it attacks or is targeted by an opponents spell, it can deal three damage to each opponent (making it potentially useful in multiplayer formats such as Commander) or exile (essentially remove from the game, in Magic: The Gatherings lingo) the top two cards of the players deck - the player then picks one of those two cards, which they can choose to play until the end of their next turn
In a day when the only thing stopping players from seriously considering Mana Flare was that they were too busy saving up to buy their last Mox and they had enough respect for their red creatures to make sure most of them were tough enough to survive a Lava Dart, even if they didn't even know how good Lightning Bolt was let alone that they'd be pricking dogs with darts
