Once per turn, during the Battle Phase: You can Special Summon 1 "Amazoness" monster from your hand, and if you do, it gains 500 ATK until the end of this turn (even if this card leaves the field). After damage calculation, if your "Amazoness" monster battled an opponent's monster while this card is already face-up in your Spell & Trap Zone: You can banish that opponent's monster. If this card on the field is destroyed and sent to the GY: You can target 1 "Amazoness" monster in your GY; Special Summon it.
Amazoness Swords Woman and Fighter's effect makes it so that they can't take any battle damage, but Swords Woman can inflict damage based on the damage that you would've taken. This makes them a good suicide monster to banish your opponent's monsters. Baby Tiger is also useful since it can essentially revive itself multiple times.
Amazoness Onslaught requires you to attack you opponent's monsters which could be a problem when your Amazoness monsters have low attack. Use these cards to protect them from being destroyed during battle. Amazoness Queen makes all your Amazoness monsters immune to battle destruction as long as she is on the field. Intrigue Shield and Amazoness Heirloom and Intrigue Shield prevent them from being destroyed by battle once per turn, with Amazoness Heirloom having its own effect to destroy your opponent's monster in case you don't have Amazoness Onslaught on the field yet.
Having some spell/trap destroying card is always handy in any deck. There will be times when you want to destroy your own Onslaught before your opponent reacts, Especially since one of the most commonly used back row removal card is Cosmic Cyclone. Cosmic Cyclone is a quick-play spell that you can use after you use Onslaught during battle phase. Storm is a pre-emptive destruction in case you want to avoid attacking into your opponent's back row.
Avoid battle damage if you are using cards like Baby Tiger, or attacked by a high attack monster. If you have Onslaught active, making them "can't be destroyed by battle" is a very strong effect since it will let you use 1 monster for many monster removals.
Oh, that's right... Nerokius prevents the activation of effect even when attacked... That's good to know. Still, it can't be too easy getting out 3 gladiator beasts out (to summon Nero) without being overwhelmed first, so good job, if you can achieve that consistently.
As I said: It was luck. Another deck can achieve victory through damage.
I don't say it's reliable, but compared to SSA(which can make itself immune to anything except banish) or now SB, Onslaught is good handable. Just not straight attack w/o using brain.
Ok. If banishing card is the 'best' tell me why macro cosmos and d. Fissure are limited at TCG? Amazoness onslaught does more than just banishing, so for logic this card should be limited or better should enter at Forbidden list.
I feel like the ideal Sylvan hit would be Rose Lover and Marshalleaf both being semi-limited. They're really the two OTK enablers, and having to choose between them would solve a lot of problems. (Also has the side-benefit of not hurting non-Sylvan Plant decks much, which isn't SUPER-important, but worth mentioning.) I kinda wish Carrot wasn't a card, too, but it's probably not banworthy.