Use some other real cards as a reference when you do this test
Youll usually activate the effect on turns where you expect the opponent will want to use those On Play cards the most
Get as many artifacts as possible, often in the form of 2/2 Necron Warrior tokens
For example, exiling a Battle Brawler (a creature with As long as you control a red or white permanent, Battle Brawler gets +1/+0 and has first strike) with Soulflayers delve ability wont cause Soulflayer to have first strike, even if you control a red or white permanent
Like most Magic: The Gathering cards, the value of Grond, the Gatebreaker depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (The Lord of the Rings: Tales of Middle-earth)