Given that double-sided cards have now been around for over a decade, it definitely feels as if theyve earned a place in a set that revisits past cards and has a heavy emphasis on nostalgia
In this regard, its more similar to Experimental Frenzy because you just go off
Whats your favorite permanent to blink
While it's not quite the X-spell mayhem we've come to expect from Simic, this is still a hell of a card to have, letting it grow stronger and stronger with each card you draw, before having it effectively multiply when it comes under threat from a removal spell
I wouldnt fault anyone for running Warhammer, but Shadowspear certainly modernized the design, lowering the cost to cast and equip and added in a ridiculous activated ability that gets around hexproof and indestructible that no one remembers until its too late
Resourceful Defense doesnt specify counter types or permanent types, so its fair game to move counters between planeswalkers with the activated ability